GOST 32696-2014

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  ГОСТ 32696-2014

GOST 32696−2014 (ISO 11961: 2008) Steel drill pipes for the oil and gas industry. Technical specifications

GOST 32696−2014
(ISO 11961: 2008)

INTERSTATE STANDARD

PIPES STEEL DRILLING FOR OIL AND GAS INDUSTRY

Technical specifications

Steel drill pipes for petroleum and natural gas industries. Specifications

ISS 75.140.75 *
75.180.10

* In IES No. 2−2016 GOST 32696−2014 is given with
ISS 77.140.75, 75.180.10, hereinafter in the text. -
Note of the database manufacturer.

Date of implementation 2016−01−01

Foreword

The goals and principles, the main order of works on interstate standardization are set by GOST 1.0−92 «Interstate Standardization System: Basic Provisions» and GOST 1.2−2009 «Interstate Standardization System: Interstate Standards, Rules and Recommendations for Interstate Standardization.» The rules for the development, adoption, application, update and cancel «

About the standard

1 PREPARED by the Technical Committee for Standardization of TC 357 «Steel and Cast Iron Pipes and Cylinders», Open Joint Stock Company «Russian Research Institute of Pipe Industry» (OJSC «RosNITI»)

2 was introduced by the Technical Committee for Standardization of TC 357 «Steel and Cast Iron Pipes and Cylinders"

3 ADOPTED by the Interstate Council for Standardization, Metrology and Certification (Minutes No. 45 of June 25, 2014)

For the adoption voted:

The country’s short name for the MK (ISO 3166) 004−97	Country code for MK (ISO 3166) 004−97	Abbreviated name of the national standardization body
Belarus	BY	State Standard of the Republic of Belarus
Kyrgyzstan	KG	Kyrgyzstandart
Russia	EN	Rosstandart
Tajikistan	TJ	Tajikstandart
Ukraine	UA	Ministry of Economic Development of Ukraine

4 By Order No. 989-st of the Federal Agency for Technical Regulation and Metrology of July 27, 2015, the interstate standard GOST 32696−2014 (ISO 11961: 2008) was enacted as the national standard of the Russian Federation from January 1, 2016.

5 This standard has been modified with respect to the international standard ISO 11961: 2008 * «Petroleum and natural gas industries — Steel drill pipe» (ISO 11961: 2008 Petroleum and natural gas industries — Steel drill pipes) by:

— entering additional words (phrases, indicators, references) identified in the text of this standard in bold italic *;
________________
* In the paper original, the designations and numbers of standards and regulations in the sections «Foreword», «Introduction», 5 «Information that the customer must provide when ordering drill pipes», DA and DV applications are given in normal type; marked by the text «**" in bold italic, the others in the text of the document are shown in italics. — Note of the database manufacturer.

— making additional structural elements (items, subparagraphs, paragraphs, terminological articles) identified in the text of this standard by a vertical line located on the margins of this text;

— changes in individual structural elements (subsections, paragraphs, subparagraphs, paragraphs, tables and figures) identified in the text of this standard in italics and a vertical line located in the margins of this text;

— changes in individual words (phrases, indicators) identified in the text of this standard in italics;

— changes in its structure to bring it into compliance with the rules established in GOST R 1.5 (subsections 4.2 and 4.3). A comparison of the structure of this standard with the structure of this international standard is given in the supplementary Appendix DG.

The degree of conformity is the modified (MOD)

6 This standard is developed on the basis of the national standard of the Russian Federation GOST R 54383−2011 (ISO 11961: 2008) «Steel drill pipes for the oil and gas industry.» Specifications. «

By order of the Federal Agency for Technical Regulation and Metrology dated July 27, 2015, N 989-st GOST R 54383−2011 (ISO 11961: 2008) was canceled from January 1, 2016.

7 INTRODUCED FOR THE FIRST TIME


Information on changes to this standard is published in the annual information index «National Standards», and the text of amendments and amendments is published in the monthly information index «National Standards». In case of revision (replacement) or cancellation of this standard, a corresponding notice will be published in the monthly information index «National Standards». The relevant information, notification and texts are also posted in the public information system — on the official website of the Federal Agency for Technical Regulation and Metrology on the Internet

Introduction

This standard has been modified with respect to the international standard ISO 11961: 2008 as amended by No. 1 due to the need to supplement the dimensions and strength groups of drill pipes widely used in the Russian oil and gas industry.

Modification of this standard in relation to the international standard is as follows:

— Section 2 is deleted. The content of section 2 is included in section 3, which is directly related to the use of reference normative documents;

— Section 4 is divided into two separate sections (3 and 4), which is due to the large volume of partition;

— the name of some terms is given to the name used in the national industry, for example, the term «rotary thrust joint» is replaced by the term «threaded joint», the terms «lock neck», «coupling collar», «neck of the pin» — the terms «lock shanks» «," coupling shank «," nipple shank «;

— some designations and indicators have been replaced to bring them into line with the notations and indicators adopted in the SI units and national standardization system;

— additional terms introduced traditionally in the national industry were introduced to clarify the concepts used;

— the values of the indicators expressed in the American system of units that are inappropriate for national standardization and the corresponding applications C and F are excluded;

— the accuracy of the lengths of the coupling and nipple on the outer surface is changed and , the diameter of the chamfer of the stop surfaces of the lock from two decimal places to one decimal place after the comma, in accordance with the limiting deviations indicated for these dimensions;

— American tube size conventions Series 1 and Series 2 are replaced by the corresponding values for the outer diameters and wall thicknesses, the corresponding terms «Row 1 (label 1)», «Row 2 (label 2)» are excluded;

— The strength group D, widely applied in the national industry, and its related indicators, words, phrases and regulations, have been added. Correspondence of strength groups of drill pipe bodies and properties of tensile locks and types of threaded joints is given in Appendix YES;

— three sizes of drill pipes of strength groups D and E with internal landing 73,02x9,19; 88.90x9.35 and 88.90x11.40 mm, widely used in the national industry, and related indicators;

— In addition, it is possible to make locks with threaded connections in accordance with GOST 28487−90, equivalent and interchangeable with connections according to ISO 10424−2: 2007;

— references to API standards are deleted from the standard, with references to similar ISO or ASTM standards retained;

— provisions related to licensing by the American Petroleum Institute are excluded from the standard;

— The standard is supplemented with the DB appendix, in which the approximate mass of a unit of drill pipe length is given.

A comparison of the structure of this standard and ISO 11961: 2008 is given in Appendix DV.

Compared to ISO 11961: 2008, the scope of this standard, after the addition of the strength group D, drill pipe sizes and threaded joints widely used in the Russian industry, covers all strength groups, drill pipe sizes and threaded joints provided for in the Russian Federation and GOST 27834−95. In comparison with these standards, this standard:
________________
The requirements for steel drill pipes with welded locks in the Russian Federation are established by GOST R 50278−92.

— contains great opportunities for the consumer to choose the level of requirements and quality, types of additional control and testing of products;

— establishes the properties of products, in demand in the modern oil and gas industry;

— regulates the organization and conduct of quality control operations of products, including non-destructive testing, at various stages of production;

— takes into account the requirements of GOST ISO 9001, regulates the processes of traceability and identification of products, control and validation of processes, preservation of records.

1 area of use

This standard applies to drill pipe and welded steel drill pipes for drilling and production in the oil and gas industry, supplied at three levels of product requirements (PSL-1, PSL-2 and PSL-3). The main requirements of this standard are the requirements of PSL-1. The requirements set by the PSL-2 and PSL-3 requirements levels are given in Appendix E.

This standard applies to drill pipes of the following strength groups:

— Drill pipes of strength groups D and E;

— high-strength drill pipes of strength groups X, G and S.

The standard configuration of the drill pipe, its main elements and their lengths are shown in Figure B.1 (Appendix B). The list of drill pipes to which this standard applies is given in Table A.1 (Appendix A).

This standard can also be applied to drillpipes with the types of threaded joints not specified in this standard.

Upon agreement between the consumer and the manufacturer, this standard can be applied to the body of drill pipes and / or locks of other sizes. Annex D contains additional requirements for impact bend tests, non-destructive testing, batch size, documentation and marking that can be agreed between the consumer and the manufacturer.

This standard does not address the operational properties of drill pipes.

Notes

1 In this standard, the following parameters are used to refer to drill pipes: OD and pipe wall thickness, strength group (D, E, X, G or S), type of landing, and type of threaded joint. The designation is used to identify drill pipes when placing an order.

2 Requirements for threaded joints of locks are given in standards [1], [2] and GOST 28487 **.

3 The operational properties of drill pipes are given in standard [3].

2 Normative references

________________
The use of the simultaneous reference to the two standards for the test method means that such standards are interchangeable according to their requirements.

Normative references to the following standards are used in this standard: *

GOST ISO 9000−2011 Quality management systems. Basic provisions and vocabulary

GOST 26.008−85 ** Fonts for inscriptions to be applied by engraving. Executive dimensions

GOST 9012−59 (ISO 410−82, ISO 6506−81) Metals. Method for measuring Brinell hardness

GOST 9013−59 (ISO 6508−86) Metals. Method for measuring Rockwell hardness)

GOST 10006−80 (ISO 6892−84) Metallic pipes. Tensile test method

GOST 16504−81 ** System of state product tests. Testing and quality control of products. Basic terms and definitions

Weld-on locks for drill pipes. Technical specifications

GOST 28487−90 ** Thread conical lock for elements of drill columns. Profile. Dimensions. Tolerances

GOST 28548−90 ** Steel pipes. Terms and Definitions

GOST ISO 6507−1-2005 Metallic materials. Determination of Vickers hardness. Part 1. Test method

NOTE — When using this standard it is advisable to check the operation of reference standards in the public information system — on the official website of the Federal Agency for Technical Regulation and Metrology on the Internet and on the annual information index «National Standards», which was published as of January 1 of this year, and on the issues of the monthly information index «National Standards» for the current year. If the reference standard is replaced (modified), then when using this standard should be guided by a replacement (modified) standard. If the reference standard is canceled without replacement, then the provision referring to it is applied in the part not affecting this reference.

3 Terms and definitions

In this standard terms are used in accordance with GOST 16504, GOST 28548, GOST ISO 9000 and standard [4], as well as the following terms with the corresponding definitions:

3.1 Analysis of melting (heat analysis): The result of chemical analysis of melting steel according to the manufacturer.

3.2 a document on the certification of welding equipment and its operators: A document certifying that the welding equipment and its operators are capable of performing weld seams that meet the requirements of this standard when applying the welding process instruction.

NOTE — Includes protocols for certification tests.

3.3 seamless pipe: A pipe product made of deformable steel made without a weld.

NOTE — Seamless pipes are manufactured by hot deformation, if necessary with subsequent cold deformation and / or heat treatment, to obtain the desired shape, dimensions and properties.

3.4 Drill -pipe: drill-pipe body with welded lock parts (nipple and clutch).

3.5 validation: Acknowledgment based on the provision of objective evidence that the requirements for a particular use or application have been met.

NOTE — The term is introduced to clarify the concept.

3.6 sampling (sample): One or more items selected from the batch and representing it in the course of monitoring and testing .

3.7 planted end, the landing (upset end; upset): Plot at the end of the drill pipe body with increased wall thickness and the outer and / or inner diameters differing from the diameter of the pipe body, obtained by hot pressing. The landing may be external (the outer diameter of the landing is greater than the outer diameter of the body of the pipe), the inner diameter (the internal diameter of the landing is less than the internal diameter of the pipe body) or combined (the outer diameter of the landing is larger and the inner diameter is smaller than the corresponding pipe body diameters).

NOTE — The term is introduced to clarify the concept and difference from the term 3.8.

3.8 landing (upsetting): Process operation execution upset ends of the tube. NOTE — The term was introduced to clarify the concept of the process.

3.9 defect: An imperfection having a size sufficient to reject a product based on criteria established by this standard.

3.10 bevel diameter of tool joint: The outer diameter of the thrust sealing surfaces (the end of the coupling and the shoulder of the pin) of the threaded locking joint of the lock.

3.11 weld procedure qualification record: A document confirming that a specific technological instruction for welding allows the production of welds in accordance with the requirements of this standard.

3.12 quench crack: A crack in steel caused by stresses caused by the transformation of austenite into martensite, which is accompanied by an increase in volume.

3.13 lock (tool-joint): forged or rolled steel drill pipe member having a threaded thrust and compound consisting of two parts — the pin and the sleeve welded to the ends of the drill pipe body.

NOTE — Depending on the context, lock refers to both parts of the lock, whether screwed or not.

3.14 shoulder under the elevator (elevator shoulder): Plot clutch lock conical or rectangular shape, designed to grip the drill pipe elevator.

NOTE — The term is introduced to clarify the concept.

3.15 incision (gouge): Risks or cavities formed when metal is removed during machining.

3.16 weld zone: A zone consisting of a welded seam and heat affected zones on either side of the weld seam formed during friction welding and subsequent heat treatment.

3.17 The manufacturer of drill pipe (drill-pipe manufacturer): The company, the company or companies that perform welding locks drilling pipes to the body, thermal and mechanical treatment after welding and is responsible for compliance with the drill pipe with the applicable requirements of this standard.

3.18 The manufacturer of locks (tool-joint manufacturer): The company, the company or companies that have equipment for the manufacture of locks and are responsible for compliance with the applicable requirements of the lock standard.

3.19 manufacturer of drill-pipe-body manufacturer: A firm, company or enterprise that has equipment for manufacturing drill pipe bodies and is responsible for their compliance with the requirements of this standard applicable to the body of drill pipes.

3.20 manufacturer: Depending on the context: drill pipe manufacturer, drill pipe manufacturer or lock manufacturer.

3.21 mass code drill pipe (drill-pipe-mass code number): dimensionless symbol unit mass body length of drill pipe. The code of mass is used at registration of orders for drill pipes, and also at their labeling. NOTE — The term is introduced to clarify the concept.

3.22 coefficient drillpipe torsional strength (drill-pipe torsion strength ratio): ratio torsional strength of the tool joint of the drill pipe and the body.

3.23 linear imperfection: Imperfection, the length of which considerably exceeds its width, such as captivity, sunset, crack, scrape from the mandrel, undercut, incision, «ivory skin», etc.

3.24 checkmark (benchmark): The sign applied for monitoring wear of bearing surfaces and lock parts used in their repair (see 8.4.4 and standards [1] and [2].).

3.25 the lock clutch; clutch (tool-joint box, box): Part of the lock with internal thread.

3.26 nonlinear imperfection (non-linear imperfection): Imperfection, the length of which is commensurate with its width, such as a shell, a dent with a rounded bottom, and so on.

3.27 imperfection: The discontinuity of the wall or surface of the product, which can be detected by the methods of nondestructive testing, provided for in this standard.

3.28 unimportant variables (non-essential variable): A variable parameter whose variation in the technological instructions for welding does not require re-certification.

3.29 nipple of the lock, nipple (tool-joint pin, pin): Part of the lock with external thread.

3.30 lot size (lot size): Number of items in the lot.

3.31 ovality landing (upset ovality): The difference between the largest and smallest diameter in the plane perpendicular to the body axis of the drill pipe.

3.32 batch (lot): A certain number of products manufactured in conditions considered to be the same for a given metric.

3.33 melting; steel melting (heat or heat of steel): The metal obtained in one cycle of the steelmaking process.

3.34 indication: A signal from imperfection that requires an interpretation to determine its significance.

3.35 consumer (purchaser): The party responsible for determining the requirements for the ordered products and payment for this order.

3.36 acceptance; control (inspection): The process of measuring, studying, testing or other comparisons of products with the requirements.

3.37 running- in of threaded joints (break-in-procedure): The process of screwing and unscrewing a new threaded connection to ensure correct screwing and reduce lock-up of the lock thread during operation. NOTE — The term was introduced to clarify the concept of the process.

3.38 products; Products: Drill pipes, drill pipe bodies or locks.

3.39 traceability (traceability): The ability to trace the history, application or location of the product. NOTE — The term is introduced to clarify the concept.

3.40 threaded connection (rotary shouldered connection): Connection of elements of the drill string, having a conical lock thread and thrust sealing surfaces (the end of the coupling and the nipple of the lock) .

3.41 friction welding (rotary friction welding): A method of welding under the influence of compressive force on the welded parts, one of which rotates relative to the other about a common axis, which leads to heating, the plastic deformation and welding of the surfaces.

NOTE — Friction welding with direct drive and inertial friction welding are used.

3.42 welded neck of drill pipe (drill-pipe weld neck): A mechanically machined section of a drill pipe consisting of a cylindrical drill pipe body, a weld seam and the tail of the lock.

3.43 » elephant hide»: Discontinuities of the outer surface of the drill pipe body, formed during the landing process.

3.44 average hardness (mean hardness number): Result of averaging hardness numbers obtained on a separate sample or on the estimated area.

3.45 significant variable (essential variable): A parameter change which affects the mechanical properties of the weld joint area.

3.46 carbide surface hardening (hard banding; hard facing): Application carbide material on the outer surface of the lock in order to reduce its wear.

3.47 the body of the drill pipe (drill-pipe body): seamless pipe with upset ends.

3.48 the pipe body (pipe body): seamless pipe without landing and transition portions modified during the landing.

3.49 instruction manual welding (welding procedure specification): The document containing instructions for the operator of the welding unit to obtain the production welds that meet the requirements of this standard. Includes all the essential and non-essential variables of the friction welding process used to connect the lock parts to the drill pipe body. The welding technological instruction applies to all welds having the same specified dimensions and chemical composition grouped in accordance with the documented procedure, which provides predictable results of treating the weld zone for a particular strength group.

3.50 nipple shank, coupling shank, lock shanks (pin neck, box neck, tool-joint necks): Sections of a nipple and / or a cylinder lock clutch intended for welding lock parts to the body of a drill pipe. NOTE — The term is introduced to clarify the concept.

3.51 hardness number (hardness number): The result of measurement at a single indentation hardness control.

4 Notations and abbreviations

4.1. The following symbols are used in this standard:

 — the angle of the conical surface of the lock clutch;

 — the angle of the conical surface of the pin nipple;

(, ) — elongation of the sample with an estimated length of 50.0 mm in the tensile test;

() — the change in the weight of the drill pipe body as a result of the landing of both ends;

 — the density of steel;

() — the yield strength of the body of the drill pipe or lock;

() — the yield strength of the welded joint zone;

(, ) — temporary resistance of the body of the drill pipe or lock;

b (W) — width of the calculated part of the sample in the form of a strip for tensile testing;

D — outer diameter of the lock (nipple and clutch);

 — the outside diameter of the pipe body;

 — diameter of the chamfer of the thrust surfaces of the pin and clutch;

 — outer diameter of lock shanks before welding and final machining;

 — the outer diameter of the drill pipe body;

 — the outer diameter of the welded joint of the drill pipe after machining;

d (D) — diameter of the calculated part of a cylindrical specimen for tensile testing;

 — inside diameter of the lock clutch;

 — internal diameter of the pipe body;

 — the internal diameter of the lock shanks before welding and final machining;

 — internal diameter of drill pipe body disembarkation;

 — inside diameter of the pin nipple;

 — diameter of the internal chamfer of the pin nipple in the plane of the butt;

 — internal diameter of the welded joint of the drill pipe after machining, as specified by the drill pipe manufacturer;

 — work of impact when testing a sample with a V- notch;

L — the length of the drill pipe with a welded lock (from the stop face of the coupling to the stop of the nipple);

 — the length of the lock clutch on the outer surface, including the facet end face and the hard-alloy surface hardening zone;

 — total length of the lock clutch;

(A) is the working length of the tensile test specimen;

 — length of external drill pipe body disembarkation;

 — length of internal drill pipe body disembarkation;

(G) is the calculated length of the specimen for the tensile test;

() — the length of the nipple of the lock along the outer surface, including the facet of the thrust ledge;

 — total length of the pin nipple;

 — length of the drill pipe body;

 — the estimated length of the drilling lock;

 — the distance behind the transitional section of the outer landing, on which the limiting deviations of the outer diameter of the drill pipe body are applied;

() — the length of the transitional section of the external drill pipe body disembarkation;

() — the length of the transitional section of the internal drill pipe body disembarkation;

() is the estimated weight of the drill pipe body length ;

 — Approximate estimated mass of the lock;

() — approximate estimated mass per unit length of the drill pipe;

() is the calculated mass per unit length of the pipe body;

R is the fillet radius of the tensile test specimen;

 — radius of conjugation of the outer surface of the shank of the pin nipple and the adjacent conical surface;

 — the radius of the fillet of the rectangular shoulder under the elevator;

S (A) is the cross-sectional area of the tensile test specimen;

() — the cross-sectional area of the drill pipe body, determined by the nominal dimensions of the pipe body;

() — the cross-sectional area of the welded joint zone;

t is the wall thickness of the pipe body;

 — the volume of the lock assembly.

4.2 The following abbreviations are used in this standard:

DPB — drill pipe body;

EU — external landing;

HBW — Brinell hardness when introducing a ball of tungsten carbide;

HRC — Rockwell hardness (scale C) when introducing a diamond cone tip;

HV10 — Vickers hardness when introducing a diamond pyramid with a test load of 980 N;

IU — internal disembarkation;

IEU — combined (external and internal) landing;

PSL — the level of requirements for products;

UF — landing in dimensions that differ from those specified in this standard;

ISO — International Organization for Standardization.

5 Information that the customer must provide when ordering drill pipes

5.1 When ordering drill pipes manufactured in accordance with this standard, the customer must indicate the following information in the order:

1) standard	GOST 32229−2015
2) the number	-
3) the outer diameter of the body of the pipes	Table A.1 (Annex A)
4) the wall thickness of the pipe body t	Table A.1 (Annex A)
5) Strength group	Table A.1 (Annex A)
6) type of disembarkation (internal, external or combined)	Table A.1 (Annex A)
7) type of threaded joint	Table A.1 (Annex A)
8) group of lengths	Table A.3 (annex A)
9) delivery date and shipping instructions	-
10) the need for an inspection conducted by the consumer	appendix C
11) additional documentation	6.17 and D.3 SR15 (annex D)

5.2 The consumer may, at his own discretion, specify the following requirements in the order:
1)	outer diameter of locks D	6.2.2
2)	inner diameter of the pin nipple	6.2.2
3)	the length of the nipple of the locks on the outer surface	6.2.6
4)	the length of the clutch of the locks on the outer surface	6.2.6
5)	minus the maximum deviation of the wall thickness of the pipe body, if it is less than 12.5%	7.2.6
6)	type of heat treatment of drill pipe bodies for strength groups D and E	7.4.3
7)	necessity of carbide surface hardening of lock couplings: its type, location, dimensions and acceptance criteria	8.4.7
8)	special type of threaded joint of locks	8.2.5
9)	special thread or preservative grease	6.4.7
10)	type of thread fuses	6.4.7 and 8.4.8
eleven)	additional labeling requirements	6.15, 7.20 and 8.13
12)	individual traceability of drill pipes	6.5.
13)	right or left thread direction of threaded stop	6.2.1 and 8.2.5
14)	conical or rectangular view of the shoulder under the elevator locks	6.2.2
15)	the angle of the conical portion of the pin nipple is 35 degrees or 18 degrees	Figure B.12 (Annex B)
16)	marking on locks	8.4.4
17)	threading of threaded joints	8.4.6
18)	stepped nipple opening and / or lock clutch	Figure B.12 (Annex B)
5.3 The following requirements can be agreed between the consumer and the manufacturer:
1)	internal coating of drill pipes or non-coating	6.4.5, 6.4.6 and 7.4.4
2)	the dimensions of the drill pipes not provided for in this standard and their maximum deviations	6.2.2
3)	Nondestructive testing for strength groups D, E, X and G	D.2 SR2 (annex D)
4)	quality document	D.3 SR15 (annex D)
5)	Impact bending test for pipe bodies of strength groups D and E	D.4 SR19 (annex D)
6)	Alternative impact test at low temperature	D.5 SR20 (annex D)
7)	periodicity of the weld joint test	D.6 SR23 (annex D)
8)	Increased requirements to the results of tests of welded joint zone on impact bending	D.7 SR24 (annex D)
9)	level of requirements for products PSL-2 and PSL-3	Annex E

6 Requirements for drill pipes

6.1 General

Drillpipes shall consist of drill pipe bodies meeting the requirements of clause 7 and locks meeting the requirements of clause 8. The parts of drill pipe and lock bodies subjected to welding and machining shall comply with the requirements of clause 6.

6.2 Dimensions, weights and joints

6.2.1 Standard configuration

The configuration of the drill pipes should be as shown in Figure B.1 (Appendix B). Drillpipes shall be supplied with the dimensions and limit deviations given in tables A.1 and A.2 (Annex A) and / or specified in the order. All dimensions without limit deviations are intended for design and are not measured to determine whether the products meet the requirements of this standard. Dimensions of drill pipes not specified in this standard or in the order are selected at the discretion of the manufacturer.

The threaded joint of drill pipes must have dimensions and limit deviations given in standards [1], [2] or GOST 28487 ** , unless otherwise specified in the order. If the order does not specify the supply of drill pipes with the left thread direction, drill pipes with a threaded connection with a right-hand thread must be delivered.

6.2.2 Alternative configuration

If specified in the order, drill pipes must be supplied in sizes not provided for in this standard, or with a rectangular shoulder under the elevator. In this case, dimensions, dimensional deviations and marking must be agreed between the consumer and the manufacturer. In accordance with this agreement, the dimensions of the drill pipe bodies and locks must be changed, the remaining drill pipe requirements must comply with the requirements of this standard.

The outer diameter of the locks of the locks D and the inner diameter of the nipples of the locks , given in Table A.1 (Annex A), provide the torsional strength of the drill pipe, equal to 0.8. Changing the external and internal diameters of locks can lead to a decrease in this coefficient, so the consumer should assess its sufficiency for specific operating conditions (recommendations for calculating the coefficient according to the standard [3]) .

6.2.3. Diameters of the welded neck of the drill pipe

The outer and inner diameters of the welded neck of the drill pipe after welding the lock and machining and / or grinding must correspond to the outer diameter and inner diameter welded joint (Figure B.1, Annex B). Outside diameter shall comply with the requirements of Table A.1 (Annex A) and 6.3.2. Inner diameter must meet the requirements of 6.3.2 and may be different for the welded joint areas of the coupling and nipple.

6.2.4. Internal diameters of the lock

Internal diameter of the pin nipple must meet the requirements specified in Table A.1 (Annex A). Internal diameter of the lock clutch must match the diameter set by the manufacturer, but must be at least the inside diameter of the pin nipple .

6.2.5 Length of drill pipes Drill pipes must be supplied in lengths within the limits specified in Table A.3 (Annex A) or other lengths specified in the order. The drill pipe manufacturer shall establish the length of drill pipe bodies and locks in such a way as to ensure the required length of the finished drill pipe .

6.2.6. The length of the lock on the outer surface

As agreed between the manufacturer and the customer, drill pipes with extended nipple lengths and couplings over the outer surface and and, respectively, the overall lengths of the nipple and the coupling and , than those indicated in Table A.1 (Annex A).

6.2.7. Endurance

Each drill pipe should be checked for patency along the entire length of the lock and disembarkations using a cylindrical mandrel having a diameter of 3.2 mm less than the nominal internal diameter of the nipple . The length of the mandrel must be at least 100.0 mm.

NOTE — Continuity control over the entire length of the drill pipe is not required.

6.2.8 The alignment of the drill pipe body and the welded lock

The axes of the drill pipe body and the welded lock must coincide.

The misalignment of the body of the drill pipe and the welded lock must not exceed:

— Parallel misalignment of 4.0 mm — according to the general indication of the indicator arrow;

— angular misalignment of 8 mm / m — for pipes with external diameter of the pipe body 114.30 mm or more;

10 mm / m — for pipes with outside diameter of pipe body less than 114.30 mm.

The lock axis must be defined over the outer surface of a diameter D that has not been labeled or hard alloyed. The axis of the drill pipe body must be defined at the length of the outer surface of the pipe body at least 400 mm.

6.2.9 Weld joint zone profile

The area of the welded joint should not have sharp changes in the cross-section and sharp edges. The internal profile of the welded joint zone should not cause the L-shaped control tool to hang.

6.3. Material requirements

6.3.1 General

The properties of the drill pipe bodies and locks shall correspond to those indicated in Tables A.4-A.8 (Annex A).

6.3.2. Requirements for the yield strength of the weld zone

The tensile load corresponding to the yield stress of the weld joint zone must be not less than the load corresponding to the yield strength of the drill pipe body in accordance with the following formula

, (1)

Where  — minimum design yield strength of welded joint zone, MPa;

 — minimum cross-sectional area of the welded joint zone, mm ;

 — minimum predetermined yield strength of the drill pipe body, MPa;

 — the cross-sectional area of the drill pipe body, determined by the nominal dimensions of the pipe body, mm .

The minimum cross-sectional area of the weld joint zone is calculated by the following formula

, (2)

Where  — minimum cross-sectional area of the welded joint zone, mm ;

 — the minimum permissible outer diameter of the welded joint of the drill pipe after machining, mm;

 — the maximum permissible internal diameter of the welded joint of the drill pipe after machining, as specified by the drill pipe manufacturer, mm.

6.3.3. Welding zone hardness requirements

When checking the surface hardness, no hardness number should exceed 37 HRC or an equivalent value for hardness testing by another method.

When checking the hardness of the wall thickness, the average hardness value of the welded joint zone should not exceed 37 HRC or 365 HV10.

6.3.4. Performance requirements for impact testing in the impact bend test for the weld zone

The impact work of the impact bend test for the welded joint zone shall be no less than that specified in Table A.8 (Annex A). For one sample, impact work is allowed below the required average value of the minimum impact work, but none of the samples shall have an impact work below the required minimum value for a single sample.

Additional requirements for PSL-3 are given in Appendix E.

6.3.5 Alternative requirements for impact work in the impact bend test for the weld zone

If specified in the order, the impact work of the impact test for the weld zone shall comply with the requirements given in D.5 SR20 and / or D.7 SR24 (Table A.8, annex A).

6.3.6 Requirements for the welded joint zone in the lateral bending test

After the lateral bending test, the curved surface of the samples in the weld zone should not have open discontinuities larger than 3.0 mm when measured in any direction. On the inner bend of the specimen, open discontinuities are allowed if they are not the result of incomplete penetration, the presence of inclusions or other internal discontinuities.

6.4 Process for manufacturing drill pipes

6.4.1 Processes requiring validation

Processes corresponding to the final operations in the manufacture of drill pipes, which determine their compliance with the requirements of this standard (except for the requirements for chemical composition and size), must undergo a validation procedure.

For drilling pipes, processes requiring validation are welding and heat treatment of welded joints.

6.4.2 Welding technology certification

The manufacturer must have a document certifying the welding technology, which includes heat treatment after welding, the technological instruction for welding and the documents for the certification of welding equipment and its operators, developed in accordance with the standard [5]. The listed documents should establish significant and non-essential process variables, as well as the permissible number of repeated heat treatment operations.

The document on certification of welding equipment and its operators should contain, as a minimum, the values of the specific variables (essential and nonessential) used when welding the lock to the body of the drill pipe, and the results of all mechanical tests of samples taken from trial welds in accordance with 6.3.

In addition, the manufacturer must conduct macrostructural studies of the weld to verify the absence of fissures and cracks.

The manufacturer must have separate documents on the certification of welding equipment and its operators for each technological instruction for welding used by operators.

6.4.3 Welding of the lock to the body of the drill pipe and heat treatment after welding

The welding of the lock to the body of the drill pipe must be carried out by the method of welding with friction.

After the lock is welded, the weld joint zone must be heat treated throughout the entire wall thickness at a distance from the weld line where the fibers of the lock material and the drill pipe body are modified during welding.

The weld zone must be heat treated, including austenitization, cooling below the transformation temperature and tempering at a temperature of at least 593 ° C.

6.4.4 Machining of the welded joint

The welded zone must be machined and / or ground and sanded on the outer and inner surfaces flush with the adjacent drill pipe body and lock shank surfaces (without visible scoring and abrupt changes in the profile section).

The tool marks that result from the usual machining operations are allowed.

6.4.5 Interior coating

Upon agreement between the manufacturer and the customer, the coating on the inner surface of the drill pipe must be coated along the entire length, with the exception of threaded surfaces. The type of coating should be specified in the order, and the coating and its control should be carried out in accordance with the documented procedure.

6.4.6 Outer coating

If the order does not specify otherwise, the outer surface of the drill pipe must be coated to protect against corrosion during transport. The coating should provide protection for the product for at least three months and be smooth, dense to the touch, with minimal streaks.

6.4.7 Threaded fuses

The thread and thrust surfaces of the threaded thrust joints shall be protected from damage by fuses during the transport and storage period. If the order does not specify otherwise, the type of threaded fuses is chosen by the manufacturer.

Before installing the fuses on clean threaded and thrust surfaces, a conservation grease must be applied. If the order does not specify otherwise, the manufacturer selects the type of lubricant.

If specified in the order, a thread lubricant intended for threaded thrust joints should be applied instead of the preservative grease .

6.5 Traceability

The drill pipe manufacturer shall develop and follow procedures for the preservation of traceability by melting drill pipe bodies and locks (see Sections 7 and 8 respectively), as well as for any applicable additional requirement and / or PSL requirement.

The identification of the batch of all welded joints must be kept until the end of all necessary tests and documented confirmation of compliance with the established requirements. Procedures should ensure the traceability of welded joints prior to the batch and to the results of mechanical testing and control.

Additional requirements for traceability must be agreed and specified in the order.

6.6 Inspection and testing. General Provisions

6.6.1 Verification, verification and calibration of control and test equipment

The manufacturer shall establish and document the frequency and procedures for verifying, verifying and calibrating the equipment (including cases of untrusted and uncalibrated conditions and their effect on products) in order to confirm that all products comply with the requirements of this standard.

6.6.2. Sizing control

The outer and inner diameters of the welded joint of the drill pipe after the final machining and must be checked for compliance with the requirements of 6.2.3 in accordance with the documented procedure.

6.6.3 Length of drill pipe

The length of the drill pipe L (figure B.1, appendix B) shall be measured from the stop face of the coupling to the stop shoulder of the lock nipple. The length of the drill pipe must be registered and indicated for the user. The accuracy of the measuring instruments shall be ± 0.03 m. The length of the drill pipe shall be indicated in meters accurate to the second decimal place.

6.6.4 Straightness

Drill pipes must be visually checked for straightness. In disputed cases, the straightness of the drill pipe body and the end straightness shall be measured in accordance with 7.14.

6.6.5. Cross-country control

The patrol control must be carried out in accordance with the requirements of 6.2.7. The ends of the mandrel, beyond the prescribed length of the cylindrical portion of the mandrel, must be designed to facilitate insertion of the mandrel into the drill pipe. The mandrel must freely pass through the entire length of the lock and disembark the drill pipe body when the mandrel is moved manually or mechanically. In disputed cases, control must be carried out with the mandrel moving manually.

6.6.6 Internal profile

The internal profile of the weld zone from each end of the drill pipe must be visually checked for compliance with 6.2.9. In disputable cases, the internal profile should be checked as follows.

The configuration of the welded joint zone should be checked with a L-shaped tool (Figure B.2, Appendix B). The contact tip should be perpendicular to the handle of the instrument, which is determined visually. The radius of the contact tip should not exceed the internal radius of the weld joint control zone. The sharp edges of the contact tip should be rounded. The contact tip of the L-shaped tool must be perpendicular to the longitudinal axis of the welded joint zone as it passes along the entire area of the welded joint. The pressure on the contact point must not exceed the pressure created by the weight of the L-shaped tool.

6.6.7. The alignment of the body of the drill pipe and the lock

The alignment of the drill pipe body and the lock must meet the requirements of 6.2.8 and should be checked in accordance with the documented procedure.

The alignment scheme is shown in Figure B.10 d of Appendix B.

6.7 Batch size and sampling from weld zone

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* In the paper original, the title of Section 6.7 is in italics. — Note of the database manufacturer.

6.7.1. The size of the lot

The batch must consist of drill pipes with welded joints, obtained during one technological cycle (continuous or periodic), using the same welding equipment (without changing the settings), for the same certified procedures (technological instruction for welding and document on the certification of welding equipment and its operators).

6.7.2 Samples for testing

The initial test specimens, if dimensions permit, should be selected from one weld zone.

6.8 Tensile test for weld zone

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* In the paper original, the title of Section 6.8 is in italics. — Note of the database manufacturer.

6.8.1 Method

The tensile test is carried out at room temperature in accordance with the requirements of GOST 10006 or [6].

The yield stress of the welded joint metal zone must correspond to the load causing the elongation of the calculated sample length to be 0.2%.

Testing of samples from pipes in the state before final machining is allowed, but after the final heat treatment.

Do not break the sample through the weld line.

6.8.2 Verification of test equipment

Not earlier than 15 months before the test, verification of the test machines in accordance with the standard [7] or [8] shall be carried out.

Not earlier than 15 months before the test, the extensometer should be checked in accordance with the standard [9] or [10]. Records of verification should be stored in accordance with 6.17.4 and Table A.9 (Annex A).

6.8.3 Samples

The sample in the form of a longitudinal segment of sufficient length, including the entire area of the welded joint, is prepared appropriately and subjected to etching to determine the location of this zone relative to the weld line and the transverse orientation of the fibers. Etching segment conducted to confirm that the sample for a tensile test of reduced cross section includes the entire weld zone, as shown in Figure B.3 a (Annex B).

From cylindrical longitudinal segment produce the maximum possible sample size, as shown in Figure B.3 a (Appendix B), the corresponding standard GOST 10006 or [6]. Preferred samples are 12.5 mm in diameter. For thin walls, alternative samples with a diameter of 9.0 or 6.5 mm can be used.

6.8.4. Frequency of testing

The periodicity of the tensile tests for welded joints shall be as specified in Table A.10 (Annex A).

Additional requirements for PSL-2 and PSL-3 are given in Appendix E.

Alternative requirements for the periodicity of tests are specified in D.6 SR23 (Annex D).

6.8.5 Defective samples

Samples with material imperfections or poor-quality preparation, found before or after testing, can be rejected and replaced with other samples that should be considered as initial samples.

Samples should not be considered defective only because the results of their tests do not meet the required properties in the tensile test.

6.8.6 Repeated trials

If, at the initial tensile test, the results obtained do not meet the specified requirements, the manufacturer can retest two samples from the same weld joint. If the test results of both additional samples meet the specified requirements, the lot must be accepted.

If the test result of at least one of the additional samples does not meet the established requirements, the lot must be rejected. The rejected lot can be re-heat treated and tested as a new batch.

If the original sample is not sufficient to conduct a second test, samples from another welded joint of the same batch are allowed.

6.9 Hardness test for weld zone

________________
* In the paper original, the name of Section 6.9 is in italics. — Note of the database manufacturer.

6.9.1 Methods

Hardness testing is carried out according to the following standards:

— according to GOST 9012 or standard [11] by Brinell method ;

— according to GOST ISO 6507−1 or standard [12] by the Vickers method ;

— GOST 9013 or standard [13] using the Rockwell method .

The distance between the centers of prints from the indentor when checking the hardness should be at least three diameters of the print.

6.9.2 Surface hardness testing

Each zone of the welded joint shall be subjected to a hardness test on three sections of the outer surface located at an angle of 120 ° ± 15 ° to each other. The hardness control method is chosen by the manufacturer, including the use of an alternative control method. In this case, the manufacturer must demonstrate the equivalence of the results of the alternative method to the results obtained by one of the standard methods specified in 6.9.1.

6.9.3. Repeated monitoring of surface hardness

Welded joints with a hardness reading greater than 37 HRC should be re-monitored or discarded. In each case, when the hardness readings exceed 37 HRC, another hardness measurement should be carried out in the immediate vicinity of the original print. If the new hardness reading does not exceed 37 HRC, the welded joint must be accepted. If the result of the repeated measurement exceeds 37 HRC, the welded joint must be rejected.

The manufacturer can re-heat the welded joints according to the same certified procedure and again check their surface hardness.

6.9.4 Checking the hardness of the wall thickness

The periodicity of the hardness test for the wall thickness for the welded joint zone shall be as specified in Table A.10 (Annex A). The average hardness value is determined from three readings of the Rockwell C hardness, obtained at a distance of 2.5−6.4 mm from the outer and inner surfaces on either side of the weld line. For each welded joint, 12 hardness readings should be obtained and 4 medium hardness values determined by the Rockwell method, as shown in Figure B.3 (Appendix B).

6.9.5. Repeated monitoring of the wall thickness

Samples from the welded joint zone having an average hardness value exceeding 37 HRC should be re-checked, or the lot they represent should be discarded. Before re-checking, the surface to be checked may be re-grinded.

If, during the second inspection, none of the average hardness values exceed 37 HRC, the lot must be accepted. If at least one of the average values of hardness exceeds 37 HRC, the batch of welded joints represented by this sample must be rejected. A rejected batch can be subjected to a repeated heat treatment and submitted for inspection as a new batch.

6.10 Impact bending test for weld zone

________________
* In the paper original, the title of Section 6.10 is in italics. — Note of the database manufacturer.

6.10.1 Method

The test shall be subjected to a set of three longitudinal specimens from one welded joint. Impact bending tests should be carried out using the Charpy method on V-notch specimens in accordance with standards [6] and [14] at a temperature of (21 ± 3) ° C. Alternative test temperatures are specified in D.5 SR20 (Annex D), the test temperatures for PSL-3 are in Table A.8 (Annex A).

It is allowed to carry out tests at a temperature below the specified temperature, provided that the test results meet the performance requirements for the impact set for the specified temperature.

Additional requirements for PSL-2 and PSL-3 are given in Appendix E.

6.10.2 Dimensions and orientation of samples

For the impact bend test, select the largest possible size sample from Table A.11 (Annex A) for the specified outside diameter of the welded joint of the drill pipe (if necessary rounded to the nearest smaller diameter) and the calculated wall thickness of the welded zone (calculated from the specified sizes). Samples are taken from the welded joint in the longitudinal direction with respect to the axis of the drill pipe, the incision of the specimen should be oriented in the radial direction, as shown in Figure B.3 (Appendix B). The incision axis of the specimen should be located along the weld line.

6.10.3. Frequency of testing

The periodicity of the impact test for a welded joint shall be as specified in Table A.10 (Annex A).

Additional requirements for PSL-2 and PSL-3 are given in Appendix E.

The alternative test frequency is indicated in D.6 SR23 (Annex D).

6.10.4 Repeated testing

If the test results do not meet the requirements of 6.3.4, but the impact of no more than one of the samples below the minimum required value for a single sample, the manufacturer may reject the lot or re-test a set of three additional samples taken from the same weld. The impact of the impact of all three additional samples shall be not less than the minimum average impact work specified in Table A.8 (Annex A) or the lot shall be rejected. If an initial sample is not sufficient to conduct the retest, sampling from another welded joint of the same batch is allowed.

If the impact of more than one of the samples from the original set is below the minimum required value for a single sample, the manufacturer may reject the lot or re-test the additional sets of three samples taken from each of the three additional welds of the same lot. If these additional sample sets do not meet the requirements of the initial test, the lot must be rejected.

The rejected lot can be re-heat treated and tested as a new batch.

6.10.5 Defective samples

Samples with material imperfections or poor-quality preparation, found before or after testing, can be rejected and replaced with other samples that should be considered as initial samples. Samples should not be considered defective only because the results of their tests do not meet the minimum impact performance requirements.

6.11. Side transverse bending test for weld zone

________________
* In the paper original, the title of Section 6.10 is in italics. — Note of the database manufacturer.

6.11.1 Method

The lateral bending test is carried out in accordance with the standard [5], paragraphs QW-161.1 and QW-162.1. The sample is bent until an angle of not more than 40 ° between two halves is obtained, as shown in Figure B.3 (Appendix B). The weld zone must be located within the curved part of the specimen. The test was subjected to two samples: one bent clockwise and the other counterclockwise relative to the drill pipe axis.

6.11.2 Samples

One set of two samples is taken from the area of the weld joint to be tested. The transverse axis of the longitudinal specimen shall be located along the weld line. Samples should include the entire wall thickness and have a width of approximately 9.5 mm, length — not less than 150 mm.

6.11.3. Frequency of testing

The periodicity of the lateral bending test shall be as specified in Table A.10 (Annex A).

The alternative test frequency shall be as specified in D.6 SR23 (Annex D).

6.11.4 Repeated testing

If the test result of one of the samples does not meet the requirements, the manufacturer may reject the lot or test an additional set of two samples cut from the same sample from the welded joint. If both additional samples meet the requirements, the lot must be accepted. If the test result of at least one of the additional samples does not meet the established requirements, the lot must be rejected.

Preferably, both additional samples are cut from the same sample as the original samples. If it is not possible to cut out additional samples from the same sample, they can be taken from another welded joint of the same batch.

The rejected lot can be re-heat treated and tested as a new batch.

6.12 Imperfections and defects of drill pipes

6.12.1 General

The drill pipe must not have the defects described in this standard.

6.12.2 Weld joint zone faults

Any imperfection of the weld joint zone detected by visual inspection in accordance with 6.13 or with a wet fluorescent magnetic particle inspection in accordance with 6.14.2 shall be considered a defect.

Any imperfection detected by ultrasonic testing and causing a signal equal to or greater than the signal from an artificial defect, as described in 6.14.4, should be considered a defect.

Quenching cracks should be considered as defects and should be the basis for rejecting the product.

6.12.3 Process control plan

The manufacturer, taking into account the features of the production technology and requirements 6.13 and 6.14, must develop and comply with a process control plan that ensures compliance with the requirements of 6.12.2.

6.13 Visual inspection of the welded joint zone

6.13.1 General

Each zone of the welded joint shall be visually inspected throughout the outer surface to detect defects.

Monitoring should be carried out by trained personnel. Visual acuity requirements must be documented by the manufacturer. Staff compliance with these requirements must be documented.

NOTE Examples of visual acuity requirements are given in standard [15] or [16].


The manufacturer must establish and document the requirements for the level of illumination required for visual inspection. The illumination level of the monitored surface must be at least 500 lux.

Visual inspection of defects is carried out at any suitable stage of the production process after machining the welded joint.

6.13.2 Removing defects

Defects should be completely removed by grinding or machining. All grinding operations must be performed with smooth transitions. Dimensions after grinding must comply with the requirements of 6.2.

6.14 Non-destructive testing of the weld zone

6.14.1 General

All non-destructive testing operations specified in this standard (except for visual inspection) must be performed by personnel certified in accordance with [15] or [16].

Controlled surfaces are machined and / or ground before inspection.

If this is specified in the order, non-destructive testing of the welded joint zone carried out by the customer representative and / or inspection in the presence of the customer representative is carried out in accordance with Annex C.

The control carried out according to 6.14 on equipment calibrated for the said artificial defects should not be considered as ensuring the obligatory conformity of the product to the requirements established in 6.12.

The manufacturer shall establish the necessary periodicity of testing non-destructive testing equipment in order to confirm the conformity of the products to the requirements of this standard.

6.14.2. Wet Fluorescent Magnetic Particle Inspection

The outer surface of the welded joint zone is subjected to wet fluorescent magnetic particle inspection to detect transverse imperfections in accordance with the standard [17] or [18]. The concentration of magnetic powder particles is checked every 8 hours or during the transfer of the shift. The minimum intensity of ultraviolet radiation on the monitored surface should be at least 1000 μW / cm .

6.14.3 Methods of ultrasonic testing

Each zone of the weld joint is subjected to ultrasonic inspection from the side of the drill pipe body along the entire circumference, and the beam is directed towards the weld line. For the control, ultrasonic equipment operating on shear waves (with inclined beams) is used, capable of monitoring the entire welded joint zone. The control shall be carried out in accordance with the manufacturer’s documented procedure. The gain at the control should be set not lower than the value used for calibration of the equipment according to the standard sample. In case of disagreement, a 2.25 MHz frequency converter attached to a prism from lucite with an angle of 45 ° ± 5 °, corresponding to the angle of entry of the beam into the product.
________________
An example of material available for commercial acquisition.

6.14.4 Standard samples for ultrasonic testing

To confirm the effectiveness of the application of equipment for monitoring and control methods, at least once in the work shift, a check should be carried out on setting the equipment according to a standard sample. The equipment must be configured to receive a clear signal when scanning a standard sample in a mode that simulates product control. The standard sample should have the same nominal diameter and wall thickness, acoustic properties and surface finish as the weld zone being monitored. The standard sample can have any length set by the manufacturer. The standard sample, depending on the equipment used, should have an artificial defect such as a «through bored hole» or three artificial defects such as a flat-bottomed hole (Figure B.4, Appendix B).

The manufacturer must apply a documented procedure for setting the threshold value for the rejection of products under ultrasonic testing.

Artificial defects shown in Figure B.4 (Annex B) should be identified in normal production conditions.

6.14.5 Records about the capabilities of the ultrasonic inspection system

The manufacturer must keep a record of the verification of the non-destructive testing system (sys- tems), confirming its ability to detect artificial defects that are used to adjust the sensitivity of the equipment.

Verification should include, at a minimum, the following:

a) calculation of the control area (scan plan);

b) the applicability of such control for a given wall thickness;

c) repeatability of control results;

d) orientation of the transducers, ensuring detection of defects typical for the given production process (6.14.3);

e) documentation confirming the identification of defects specific to the production process;

f) parameters for setting thresholds.

In addition, the manufacturer must keep the following entries:

— working procedures of the non-destructive testing system;

— characteristics of equipment for non-destructive testing;

— information on the certification of personnel performing non-destructive testing;

— results of dynamic tests confirming the capabilities of the system / operations of nondestructive testing in production conditions (not applicable for manual control).

6.14.6 Removing defects

Defects found with wet fluorescent magnetic powder or ultrasonic inspection should be completely removed by grinding or machining, or the welded joint should be rejected. All grinding operations must be performed with smooth transitions to the adjacent surface. The dimensions of the welded joint after grinding must comply with the requirements of 6.2. In order to check the completeness of the removal of defects after grinding, the welded joint zone must be re-checked using the same inspection method as for the initial detection of defects.

6.15 Marking of drill pipes

6.15.1 General

Drill pipes manufactured in accordance with this standard shall be marked by the manufacturer in accordance with the requirements of this subsection. At the option of the manufacturer or in accordance with the order, additional marking is allowed. The marking marks must not overlap and must be applied in such a way as to avoid damage to drill pipes.

The final marking of the drill pipes must be carried out by the drill pipe manufacturer and must ensure the traceability of the products in accordance with the requirements of this subsection.

6.15.2 Content of drill pipe markings

The final marking of drill pipes should include:

a) marking of traceability in accordance with 6.15.3;

b) marking on the body of drill pipes in accordance with 6.15.4;

c) marking on locks in accordance with 6.15.5.

6.15.3. Traceability marking

If this is stated in the order, marking of the traceability on the conical section of the pin of each lock shall be carried out [( Figure B.1 , item 9 (Annex B).) The marking shall be established by the manufacturer, taking into account the traceability requirements specified in 6.5.

6.15.4 Marking on the drill pipe body

6.15.4.1 Marking with marks

Marking by stamping should be performed on the outer surface of the cylindrical part of the landing of each drill pipe from the side of the lock nipple in a font not less than 6 — Ex 3 GOST 26.008 and include at least the following data in this order: a) the name or trademark of the drill pipe manufacturer; b) the date of manufacture (month and year of welding of the locks) in the form of a three- or four-digit number, the first one or two digits of which mean a month, and the next two digits — the year of welding locks. At the choice of the manufacturer, it is allowed not to apply the date of manufacture if it is indicated on the surface of the lock nipple behind the thread run-off according to 6.15.5; c) the outer diameter of the pipe body, rounded to an integer value; d) the wall thickness of the pipe body, rounded to an integer value; e) the strength group of the drill pipe body; f) the serial number of the drill pipe. For example, a drill pipe manufactured by Z in July 2007 (707), an outer tube body diameter of 60.32 mm (60), a pipe wall thickness of 7.11 mm (7), a pipe strength group of pipe E, having a sequence number 130 should have the following marking by stamping: Z 707 60 7 E 130. 6.15.4.2 Marking with paint Marking with a stable light paint with signs not exceeding 50 mm in height should be made on the outer surface of the pin of each lock. The marking should begin at a distance of approximately 1 m from the end of the nipple, be located along the generatrix and include, as a minimum, the following data in the indicated sequence: a) the name or trademark of the drill pipe manufacturer; b) the designation of this standard, without the year of commissioning; c) type of landing (IU, EU or IEU); d) the outside diameter of the pipe body, rounded to an integer value; e) the wall thickness of the pipe body, rounded to an integer value); f) strength group of the drill pipe body; g) the actual length of the drill pipe to the second decimal place, m; h) the actual mass of the drill pipe to the second decimal place, kg; i) additional requirements (SR), when applied; j) L2 or L3, respectively, indicating PSL-2 or PSL-3 levels.

Example — A drill pipe manufactured by Z according to GOST …, with an external planting (EU), an outer tube body diameter of 60.32 mm (60), a pipe wall thickness of 7.11 mm (7), a group of strength of the drill pipe body E, length 9.20 m, weight 95.00 kg, with additional requirements SR15, with the level of requirements for products PSL-2 (L2) should have the following marking with paint: Z GOST… EU 60 7 E 9,20 95,00 SR15 L2. At the choice of the drill pipe manufacturer or as directed in the order, the marking on the drill pipe body, made by the drill pipe manufacturer, can be retained or removed by the drill pipe manufacturer. The marking with paint can be adversely affected by the application of internal coating to drill pipes.

6.15.5 Marking on locks

Unless otherwise specified in the order, the marking shall be stamped on the surface of the nipple of each lock behind the thread run (the size of the signs shall be at the manufacturer’s option), as shown in Figure B.5 (Annex B) and include at least the following data in specified sequence:

a) the name or trademark of the drill pipe manufacturer;

b) the month of welding the lock (numbers from 1 to 12);

c) the year of welding the lock (the last two digits);

d) the name or trademark of the manufacturer of the lock;

e) the strength group of the drill pipe body;

f) Body code of the drill pipe body (Table A.12, Appendix A). The designation of the mass code not listed in Table A.12 shall be agreed between the consumer and the manufacturer;

g) type of threaded joint. For connections not listed in Table A.1, the designation agreed between the manufacturer and the customer .

Example — A drill pipe with a lock manufactured by Z and welded in July 2007 (707) by company X, the strength group of the drill pipe body E, with mass code 2, with threaded stop NC50, must have the following marking on the surface of the lock nipple for thread run: Z 707 XE 2 NC50.

If specified in the order, each lock shall be marked in the recognition slot and with grooved grooves in accordance with the requirements of the standard [3] .

The marking on the outer surface of the locks made by the manufacturer of the locks can be saved.

6.16 Minimum Requirements for Drill Pipe Manufacturers

The manufacturer of drill pipes must have equipment for welding locks to the body of drill pipes, heat treatment of drill pipes after welding and machining of welded joints.

The drill pipe manufacturer must also have the equipment to carry out all necessary types of inspection and testing or to conduct them outside the enterprise by subcontractor. In the case of testing and control by a subcontractor, it must perform them in accordance with a documented procedure under the control and supervision of the drill pipe manufacturer.

6.17 Requirements for drill pipe documentation

6.17.1 Mandatory documentation

The manufacturer of drill pipes must provide the consumer with:

a) a quality document describing the drill pipes, confirming that the drill pipes have been manufactured, tested in accordance with this standard and the order and comply with the requirements of this standard. The description of the drill pipes must contain at least the following data: the outer diameter, the wall thickness and strength group of the pipe body, the length group, the type of threaded joint and other additional requirements specified in the order;

b) a list of the serial numbers of the drill pipes supplied, indicating the actual length L of each pipe to the second decimal place [figure B.1 (annex B) and 6.6.3].

6.17.2 Additional documentation

If specified in the order, the requirements of D.3 SR15 (Annex D) shall apply.

Additional requirements for PSL-2 and PSL-3 are given in Appendix E.

6.17.3 Exchange of electronic data

Mandatory and / or additional documentation (6.17.1 and 6.17.2), applied electronically in an electronic data interchange system or printed out from it, shall have the same legal effect as the documentation printed by the drill pipe manufacturer. The content of such documentation must comply with the requirements of this standard and the current agreements between the consumer and the manufacturer regarding electronic data interchange.

6.17.4 Saving records

Table A.9 (appendix A) indicates the records to be retained by the drill pipe manufacturer and provided at the request of the consumer within five years from the date of purchase of the drill pipes from the manufacturer.

7 Requirements for the body of drill pipes

7.1 Information that the consumer must provide when ordering the drill pipe bodies

7.1.1 When ordering for drill pipe bodies manufactured in accordance with this standard, the customer must indicate in the order the following information:

1) standard	GOST …
2) the number	-
3) the outer diameter of the body of the pipes	Table A.1 (Annex A)
4) the wall thickness of the pipe body t	Table A.1 (Annex A)
5) Strength group	Table A.1 (Annex A)
6) type of drill pipe body disembarkation (internal IU, external EU or combined IEU	Table A.1 (Annex A)
7) the length of the drill pipe body and its limiting deviations	-
8) delivery date and shipping instructions	-
9) the need for an inspection conducted by the consumer	appendix C
10) additional documentation	7.22

7.1.2 The consumer may, at his own discretion, indicate in the order the following requirements:

1) special landing dimensions	7.2.2
2) the minus limiting deviation of the wall thickness of the pipe body, if it is less than 12.5%	7.2.6
3) type of heat treatment of the drill pipe body of strength groups D and E	7.4.3
4) requirements for impact bending tests for strength groups D and E	D.4 SR19 (annex D)
5) alternative requirements for impact bending tests	D.5 SR20 (annex D)
6) the level of requirements for the production of PSL-2 or PSL-3	annex E

7.2. Requirements for size and weight

7.2.1 General

The dimensions of the drill pipe body shall comply with the requirements specified in Tables A.2 and A.13 or A.14 (Annex A), unless otherwise specified in the order.

For drill pipe bodies supplied with disembarkation in sizes not covered by this standard, but otherwise manufactured in accordance with the requirements of this standard, special marking shall be provided by 7.20.

7.2.2 Configuration

The configuration of the drill pipe bodies should correspond to Figure B.1 (Appendix B). The disembarkation must correspond to one of the shown in Figure B.6, unless otherwise provided for under 6.2.2 or specified in the order.

7.2.3. Internal landing

The transitional section of the internal drill pipe disembarkation should have a smooth profile. The surface of the internal landing should not have sharp edges or sharp changes in the cross section, which could cause the L-shaped tool to hang.

7.2.4 Outer diameter variations Limit deviations of the outer diameter of the drill pipe body must meet the requirements of Table A.2 (Appendix A). The maximum deviation of the outside diameter of the drill pipe body with any type of landing behind the transitional landing site ( figure B.6 , annex B) refers to a length of 127 mm for pipes with an outer tube diameter of less than 168.28 mm and a length equal to the outer diameter for pipes with an external diameter of the pipe body of 168.28 mm.

7.2.5 Internal diameter of the pipe body

The internal diameter of the pipe body is calculated by the following formula

, (3)

Where  — estimated internal diameter of the pipe body, mm;

 — Specified external diameter of the pipe body, mm;

t is the specified pipe wall thickness, mm.

Limit deviations for not installed.

7.2.6 Limit deviations of the wall thickness of the pipe body

Minus limiting deviation of the wall thickness in any part of the body of the pipes should be no more than 12.5%. If specified in the order, the minus limiting deviation of the wall thickness of the pipe body should be less than 12.5%.

7.2.7 Length

The drill pipe bodies must be supplied with the length and length deviation limits specified in the order. The length and length limits must be sufficient to ensure the required final length of the drill pipe.

7.2.8 Mass

The weight of the drill pipe body must correspond to the calculated mass for the pipe dimensions specified in the order and the type of embankment, taking into account the deviations given below. Estimated mass of drill pipe body , kg, length is determined by the following formula

, (4)

 — estimated mass per unit length of the pipe body, kg / m;

 — length of the drill pipe body, m;

 — change in the weight of the drill pipe body as a result of the landing of both ends [tables A.13 and A.14 (Appendix A)], kg. For pipes without disembarkation is equal to zero. The calculation procedure is specified in the standard [19] or [20].

Limit deviations of the mass of drill pipe bodies should not exceed,%:

—  — for a separate pipe;

— — 1,8 — for a separate order item.

Limit deviations for a single order item when the manufacturer sends the drill pipe bodies are applicable to a product mass equal to or greater than 60 tons.

If the order specifies a minus limiting deviation of the wall thickness of the pipe body t less than 12.5%, then the positive limit deviation of the weight of a single pipe should be equal to 19% minus the specified minus limit deviation of the wall thickness.

Example — If the order specifies a minus limiting deviation of the wall thickness of 10%, the positive limit deviation of the weight of a single pipe should be 19% -10% = 9%.

7.2.9 Straightness

Deviations from straightness of drill pipe bodies should not exceed the following values (Figure B.7, Appendix B):

a) deviation from the total straightness — 0.2% of the total length of the drill pipe body length , measured from one end to the other;

b) the deviation from the end straightness is 3.2 mm at a length of 1.5 m from each end of the drill pipe body.

7.2.10 The alignment of disembarkation

The external and internal surfaces of the landing must be aligned with the outer surface of the body of the pipe. The misalignment of the outer surface of the pipe body and the external landing surface should not exceed 2.4 mm; the outer surface of the body of the pipe and the inner surface of the landing — 3.2 mm.

7.2.11 Outset of landing

The ovality measured on the outer landing surface should not exceed 2.4 mm.

7.3. Material requirements

7.3.1. Requirements for chemical composition

The chemical composition of the steel of the drill pipe bodies shall be as specified in Table A.4 (Annex A).

7.3.2. Tensile properties

The tensile properties of the drill pipe bodies shall be as specified in Table A.5 (Annex A). The tensile properties of the planted ends must comply with the requirements established for pipe bodies, with the exception of elongation requirements, which are not established for them. The conformity of the planted ends with the established requirements must be determined by a documented procedure.

The yield point should correspond to the tensile stress at which the elongation of the calculated length of the specimen under load, as measured by the extensometer, corresponds to the values indicated in Table A.6 (Annex A).

For tube bodies, the minimum elongation values of a specimen at a design length of 50.0 mm, rounded to 0.5% at an elongation value of less than 10%, and to an integer value, if the elongation is equal to or greater than 10%, shall be determined by the following formula

, (5)

Where  — minimum elongation of the sample with an estimated length of 50.0 mm,%;

k is a constant equal to 1944; S is the cross-sectional area of the sample, calculated from the specified outer diameter or the nominal width of the sample and the specified wall thickness with rounding up to 10 mm or equal to 490 mm , whichever is the smaller, mm ;  — the minimum set temporary resistance for the drill pipe bodies, MPa.

The minimum elongation values for tube bodies, calculated from formula (5), for samples of different sizes and strength groups are given in Table A.7 (Appendix A). When registering or recording the elongation values, they should also indicate the width of the test specimen when using the samples in the form of a strip, the diameter of the working part and the design length of the sample when using cylindrical samples, or indicate that samples of the total cross section were used.

7.3.3 Impact performance requirements for strength groups D and E

For the strength groups D and E, there are no mandatory requirements for impact work in the impact bend test. Additional requirements are given in D.4 SR19.

Additional requirements for PSL-2 and PSL-3 are given in Appendix E.

7.3.4 Shock performance requirements for strength groups X, G and S

The impact work of the impact test for pipe bodies should not be less than that specified in Table A.8. For one specimen, the shock is allowed to work below the required minimum mean impact work, but for any sample, the impact of the impact below the minimum value allowed for a single sample is not allowed.

The impact requirements for the impact bend test for the cut ends are not established.

Additional requirements for PSL-2 and PSL-3 are given in Appendix E.

7.3.5. Performance requirements for impact. Alternative test temperature

If specified in the order, the impact work of the impact test for pipe bodies shall comply with the requirements of D.5 SR20 (annex D) and table A.8 (annex A).

7.4 Method of production

7.4.1 Processes that require validation

Processes corresponding to the final operations performed in the manufacture of drill pipe bodies that affect compliance with the requirements of this standard (except for requirements for chemical composition and size) must undergo a validation procedure.

For bodies of drill pipes, a process that requires validation is heat treatment.

7.4.2 General provisions

Steel used for the manufacture of drill pipe bodies supplied under this standard should be obtained by the technology of fine-grained steel production.

NOTE Steel obtained from fine-grained steel manufacturing technology shall contain one or more grain-grinding elements, such as aluminum, niobium, vanadium or titanium, in amounts sufficient to ensure that the steel has a shallow austenite grain.


The body of the drill pipes must be seamless.

7.4.3 Heat treatment

Heat treatment must be carried out in accordance with the documented procedure. The procedure should indicate the permissible number of repeated heat treatment operations. The type of heat treatment is chosen by the manufacturer, unless otherwise specified in the order.

The bodies of the drill pipes must be heat-treated along the entire length after the landing.

The bodies of the drill pipes of strength groups D and E must be hardened and tempered, normalized and tempered or normalized.

The drill pipe bodies of the strength groups G, X and S must be hardened and tempered.

7.4.4 Outer coating

If the order does not specify otherwise, then the body of the drill pipes must be coated with an outer coating to protect against corrosion during transport. The coating should provide protection for the product for at least three months and be smooth, dense to the touch, with minimal streaks.

7.5 Traceability

The manufacturer of drill pipe bodies shall establish and follow procedures ensuring the preservation of identification of melting of drill pipe bodies manufactured in accordance with this standard. The identification of the lot must be maintained before the completion of all the necessary batch tests and documentation of compliance with the established requirements. Procedures should provide for ways to trace the bodies of drill pipes to the appropriate melting and the results of chemical analysis, mechanical testing and control.

Since the drill pipe bodies from the same melting can be heat treated in different batches, there can be more than one set of mechanical test results for one melting.

7.6 Inspection and testing. General Provisions

7.6.1 Verification, verification and calibration of control and testing equipment

The manufacturer shall develop and document the frequency and procedures for verifying, verifying and calibrating the control and test equipment (including cases of untrusted and uncalibrated conditions and their effect on products) in order to confirm that all products comply with the requirements of this standard.

7.6.2 Heat treatment lot

The batch must consist of drill pipe bodies with the same prescribed dimensions and one strength group, which were subjected to heat treatment under the same regime, being part of a continuous process (or batch). The bodies of drill pipes of one batch must be made of steel of the same melting or from different melts combined according to a documented procedure ensuring compliance with the requirements of this standard.

7.7 Control of the chemical composition

7.7.1 Analysis of melting

The steel of each melting used for the manufacture of drill pipe bodies should be analyzed for the purpose of determining the mass fraction of phosphorus and sulfur, as well as any other elements used by the manufacturer of drill pipe bodies to provide mechanical properties.

When manufacturing drill pipe bodies from a pipe billet supplied by a third-party manufacturer, the chemical composition of steel with the requirements of this standard must be established according to the document on the quality of the pipe billet manufacturer.

7.7.2 Product Analysis

The analysis should be subjected to two products from each melting. The results of the analysis should include data on the mass fraction of phosphorus and sulfur, as well as any other elements used by the manufacturer of drill pipe bodies to provide mechanical properties.

7.7.3 Methods of analysis

The chemical analysis is carried out by any method used for this purpose, such as emission spectroscopy, X-ray emission spectroscopy, atomic absorption method, sample combustion method, or wet analytical methods. The methods used to calibrate the equipment must provide traceability to standard material samples. In disputable cases, the chemical analysis must be carried out in accordance with the standard [21] or [22].

7.7.4 Repeated product analysis

If the results of the analysis of both samples representing the smelting of drill pipe bodies do not meet the specified requirements, then, at the manufacturer’s choice, the melting must be either rejected or all other smelting products must be subjected to individual analysis to verify compliance with the established requirements.

If only one sample of two does not meet the established requirements, the manufacturer must, at his option, reject the smelting or conduct an additional analysis of two additional products from this melting. If the results of both repeated tests meet the specified requirements, the fusion should be accepted, except for the product whose inconsistency was detected during the initial analysis. If the results of one or both repeated tests are unsatisfactory, the manufacturer must choose to reject the melting at his option or subject all other products from this melting to individual analysis.

In case of an individual analysis of other smelting products, it is necessary to determine the content of only that element or those elements for which a result is obtained that does not meet the requirements. Samples for reanalysis of products should be selected in the same way as in the initial analysis of products. If specified in the order, then the results of all repeated product analyzes should be provided to the consumer.

7.8 Tensile tests

7.8.1. Test method

The tensile test is carried out at room temperature in accordance with GOST 10006 or standard [6].

7.8.2 Verification of test equipment

Not earlier than 15 months before the test, verification of the test machines in accordance with the standard [7] or [8] shall be carried out. Not earlier than 15 months before the test, the extensometer should be checked in accordance with the standard [9] or [10]. The records should be stored in accordance with 6.17.4 and Table A.9 (Appendix A).

7.8.3 Samples for testing

Tensile tests for drill pipe bodies are carried out at the manufacturer’s choice on specimens of full cross-section in the form of strips or cylindrical specimens shown in Figure B.8 (Appendix B). The type and size of the sample shall be indicated in the test report.

Samples are taken from the drill pipe body after the final heat treatment. Cylindrical samples are taken from the middle of the wall. Cylindrical samples and samples in the form of strips (Figure B.8, Appendix B) can be selected at the manufacturer’s choice from any section along the circumference of the drill pipe body. All samples, except cylindrical specimens, should represent the total thickness of the wall of the body of the pipe from which they are cut, and should be subjected to a test without straightening.

Samples in the form of strips should have a width of the calculated part approximately equal to 38.0 mm when using appropriate curvilinear captures or when machining the ends of the sample, or when flattening to reduce the curvature in the zone of sample capture. In other cases, the width should be approximately 19.0 mm for pipes with an outer tube body diameter of less than 101.60 mm and approximately 25.0 mm for pipes with an outer tube body diameter of 101.60 mm or more.

When using cylindrical specimens, samples with a diameter of 12.5 mm are used, if the pipe size or diameter of 9.0 mm allows, if it is impossible to make a sample with a diameter of 12.5 mm. The use of cylindrical specimens of smaller diameters is not allowed.

7.8.4. Frequency of testing

The periodicity of the tensile test for drill pipe bodies shall be as specified in Table A.10 (Annex A).

The tensile test for the cut ends is not carried out unless otherwise specified in the order.

7.8.5 Control test for melting

One tensile test must be carried out by the manufacturer of the drill pipe bodies as a reference test for each steel melting used. The records for this test should be available to the consumer.

A control test of melting can also be considered a test for a batch of products.

7.8.6 Repeated trials

If the result of the initial tensile test does not meet the requirements, the manufacturer may test two additional samples from the same pipe, taken from approximately the same section. If both additional samples pass the test, then the lot must be accepted.

If at least one of the additional samples does not meet the specified requirements, the manufacturer can test samples from three additional pipes from the same batch. If the samples from all three pipes have passed the test, the lot must be accepted. If at least one of these samples does not meet the established requirements, the lot must be rejected. The rejected lot can be re-heat treated and tested as a new batch.

7.8.7 Defective samples

Samples with material imperfections or poor-quality preparation found before or after testing can be rejected and replaced with other samples that must be accepted as initial ones. Samples should not be considered defective only because the results of their tests do not correspond to the required properties in the tensile test.

7.9. Impact bending test

7.9.1 Method

The test shall be subjected to a set of three longitudinal samples taken from one section of one tube body. The impact test is carried out according to the Charpy method on samples with a V- notch at a temperature of (21 ± 3) ° C in accordance with standards [6] and [14]. Alternative test temperatures are specified in D.5 SR20 (annex D), temperatures for PSL-3 are in table A.8 (annex A).

It is allowed to perform tests at a lower temperature than the set temperature, provided that the performance requirements for the impact set for the specified temperature are met.

The proportion of the viscous component in the fracture of the samples after the tests in accordance with the standard should be determined [14].

Additional requirements for PSL-3 are given in Appendix E.

7.9.2 Sample dimensions and orientation

For the impact test, select the largest possible specimen from Table A.11 (Annex A) for the specified outer diameter (if necessary rounded to the nearest smaller diameter) and the specified wall thickness of the pipe body. The size of the smallest sample should be 10.0 x 5.0 mm.

Samples are taken in the longitudinal direction with respect to the axis of the tube body, the incision of the specimen should be oriented in the radial direction, as shown in Figure B.9 (Appendix B).

7.9.3. Frequency of testing

The periodicity of the impact test for the pipe body shall be in accordance with Table A.10 (Annex A).

7.9.4 Control test for melting

Samples for the impact bend test shall be taken after the final heat treatment in accordance with 7.9.2.

The impact test of one set of three samples shall be carried out as a control test for each steel melting used by the manufacturer of the drill pipe bodies. The test records must be available to the consumer.

A control test of melting can also be considered a test for a batch of products.

7.9.5 Repeated trials

If the test results do not meet the requirements of 7.3.3 and 7.3.4, but if the impact of only one of the samples is below the required minimum value for a single sample, the manufacturer may choose to reject the lot or repeat three additional samples from the same pipe, selected from approximately the same site. The impact performance of all three additional samples should be equal to or greater than the minimum average impact work specified in Table A.8 (Appendix A). Otherwise, the lot must be discarded or re-tested as described below.

If, during the initial test, the impact of the impact of two samples is below the required minimum value for a single sample, the manufacturer may choose to reject the lot or re-test additional sets of three samples selected from each of the three additional products from the same lot. If at least one of these additional sample sets does not meet the requirements for the initial test, the lot must be rejected.

The rejected lot can be re-heat treated and tested as a new batch.

7.9.6 Defective samples

Samples with imperfections in the material or inadequate preparation found before or after the tests can be rejected and replaced with other samples that must be accepted as initial ones. Samples should not be considered defective only because the results of their tests do not meet the minimum impact performance requirements.

7.10 Wall thickness of pipes

The thickness of the body wall of each tube is controlled along a spiral or longitudinal path along the entire length of the body of the tube, excluding the end sections not covered by automatic control systems. The control shall be carried out in accordance with the documented procedure to verify compliance with the requirements of this standard. The stage at which the thickness of the wall is controlled is determined by the manufacturer. The control process should take into account the technology of making pipes.

The manufacturer must have a documented procedure to confirm that areas not covered by automatic control systems (especially the sections between the pipe body and the transitional landing site) comply with the requirements of this standard.

Such confirmation can be carried out by a special mechanical measuring instrument or by a properly calibrated hand-held nondestructive testing device of sufficiently high accuracy in a documented procedure. In disputable cases, preference should be given to the measurement results by a mechanical measuring instrument.

A mechanical measuring instrument must have contact tips with a cross-section not exceeding 6.4 mm in diameter. The tip of the tip, contacting the inner surface of the body of the pipe, should be a rounded radius of no more than / 4 and not less than 3.2 mm. The end of the tip, in contact with the outer surface of the body of the pipe, should be a flat or rounded radius of at least 38.0 mm.

7.11 Drilling Pipe Body Length

The length of the body of the drill pipe is measured from the end of one end of the pipe to the end of the other, unless otherwise specified in the order. The accuracy of the measuring device should be ± 0.03 m. The length of the body of the drill pipes is measured in meters accurate to the second decimal place.

7.12 Internal disembarkation

The length of the internal disembarkation is checked for compliance with the requirements of Tables A.13 or A.14 (Annex A). The control should be carried out with the same frequency with which the tensile testing of the drill pipe bodies is carried out.

The control is carried out by direct measurement on samples from disembarkation or by other documented method, provided that the manufacturer can demonstrate that this method ensures compliance with the established requirements.

NOTE — The internal diameter of the drill pipe body (figure B.6, appendix B) can be chosen in such a way that it corresponds to the inside diameter of the specific locks, in this case the length of the transitional section of the internal drill pipe body must be corrected.


Additional requirements for PSL-2 and PSL-3 levels are given in Appendix E.

7.13 Internal Profile

Each end of the internal drill pipe body shall be visually checked for compliance with the requirements of 7.2.3. In disputed cases, the ends are checked with a L-shaped tool ( Figure B.2 , Appendix B). The requirements for the L-shaped tool and the procedure for monitoring are given in 6.6.6.

7.14 Straightness

The straightness of the drill pipe bodies is visually checked. In disputed cases, the straightness of the drill pipe bodies having a common bend or curved ends is measured as follows (Figure B.7, appendix B):

a) general straightness — using a straightedge or string (wire) stretched from one end of the pipe body to the other;

b) the end straightness — with a test ruler of at least 1.8 m long, resting on the surface of the pipe body beyond the bent end, or by an equivalent method.

In disputed cases, preference should be given to measurement using a calibration ruler.

A string or a straightedge is placed in such a way as to reveal the greatest deviation.

Deviations from straightness should not exceed those specified in 7.2.9. The distance at which the deviations from the total and the end straightness are measured does not include landings and areas beyond transitional landing sites for which the limiting deviations of the outside diameter of the drill pipe body outside the transition section (7.2.4).

7.15 Alignment of the planted ends

The alignment of the cut ends of the drill pipe bodies is subjected to visual inspection. In controversial cases, the alignment of the planted ends is controlled using the device shown in Figure B.10 (Annex B), from the end of the planted end to the area where the outer diameter becomes equal to . As agreed between the consumer and the manufacturer, other documented methods may be applicable.

The misalignment of the landing should not exceed the values specified in 7.2.10.

7.16 Determination of the mass

Each body of the drill pipe is weighed to determine the compliance with the maximum deviations from the calculated mass. Weighing can be carried out before or after disembarkation.

7.17 Imperfections and defects of drill pipe bodies

7.17.1 General

The body of the drill pipes must not have the defects described in this standard.

7.17.2 Defects on the surface of the body of pipes

Any imperfection of any orientation on the outer or inner surface of the pipe body should be considered a defect if:

a) it is linear and its depth in the radial direction exceeds: 12.5% of the specified wall thickness of the pipe body — for strength groups D, E, X and G or 5% of the specified tube wall wall thickness — for strength group S;

b) it is linear or non-linear and the residual wall thickness above or below the imperfection is less than the minimum required value.

7.17.3 Landing surface defects

The imperfection of any orientation on the external or internal landing surfaces, the depth of which exceeds the one specified in Table A.15 (Appendix A), must be considered a defect.

Sharp edges or changes in the cross-section of the inner surface of the landing, causing the L-shaped tool to hang, must be considered as defects.

7.17.4. «Ivory Leather»

The imperfection of the «ivory skin» surface with the depth of discontinuities more tolerable in Table A.15 (Appendix A) should be considered a defect.

7.17.5. Quenching cracks

Quenching cracks should be considered as defects.

7.17.6 Process control plan

The manufacturer, taking into account the features of the production technology and the requirements given in 7.18 and 7.19, must develop and comply with a process control plan that ensures compliance with the requirements specified in this subsection.

7.18 Visual inspection of drill pipe bodies

7.18.1 General

Visual inspection should be carried out by trained personnel with visual acuity sufficient to detect surface imperfections.

For visual inspection, the manufacturer must establish documented standards of illumination. The illumination level of the monitored surface must be at least 500 lux.

NOTE Examples of visual acuity requirements are given in standard [15] or [16].


Visual inspection of the end sections should be carried out after heat treatment. If you use another control method that allows you to detect the defects described in 7.17, visual inspection is not required.

7.18.2 Control Coverage

The body of each drill pipe must be visually inspected to detect imperfections along the entire outer and inner surfaces over the entire length of the embankment, including the transitional landing site.

7.18.3 Removing defects

Defects must be completely removed by grinding or machining. All grinding operations must be performed with smooth transitions to the contiguous surface. Dimensions of the drill pipe body after defect removal must correspond to 7.2.

7.18.4. «Ivory Leather»

The external surface of the drill pipe body is checked for lack of «ivory leather» in accordance with the requirements of Table A.15 (Appendix A). The following external surfaces are subjected to inspection (Figure B.6, Annex B):

a) on pipes with EU — landing site length , a transitional section of a length and the adjacent surface of the body of the pipes;

b) on pipes with IU and IEU — the outer surface area above the section of the length and a transitional section of length internal disembarkation, and the adjacent surface of the body of the pipes.

7.19 Non-destructive testing

7.19.1 General

All non-destructive testing operations (other than visual inspection) provided for in this standard shall be performed by personnel certified in accordance with standards [15] or [16].

If this is specified in the order, then the non-destructive testing of the drill pipe bodies by the customer representative and / or control in the presence of the consumer representative is carried out in accordance with Appendix C.

The control carried out in accordance with 7.19 on equipment calibrated for these artificial defects shall not be considered as ensuring compliance of the product with the requirements established in 7.17.

The manufacturer shall establish the necessary frequency of verification of the non-destructive testing equipment in order to confirm the conformity of the products to the requirements of this standard.

If equipment that has been calibrated or checked in accordance with the provisions of this standard has been exposed to unusual or unfavorable conditions of use, which could compromise its accuracy, then it must be recalibrated or checked before further use of the equipment. All items that have been monitored since the last satisfactory calibration or inspection must be re-checked.

The required methods for nondestructive testing of drill pipe bodies are indicated in Table A.16 (Appendix A).

The standards for non-destructive testing methods, specified in 7.19.3, are developed on the basis of traditional, proven methods and methods of nondestructive testing widely used for the control of pipe products. However, other non-destructive testing methods and methods capable of detecting the defects described in 7.17 may be applicable. Records in accordance with 7.19.8 shall be stored as specified in 7.22.4.

At the manufacturer’s choice, the notches specified in Table A.17 (Annex A) may be oriented at an angle in order to optimize the detection of defects typical of the manufacturing process. The technical rationale for changing the orientation of the notches must be documented.

Additional requirements for PSL-2 and PSL-3 are given in Appendix E.

7.19.2 Control Coverage

The body of each drill pipe must be inspected along its entire length for imperfections (longitudinal and transverse) on the outer and inner surfaces. End areas not controlled by automatic equipment shall be subjected to a magnetic particle inspection or other monitoring method capable of detecting the defects specified in 7.17. All required non-destructive testing operations, other than wall thickness control, should be performed after the final heat treatment and rotational dressing.

7.19.3 Applicable standards

The control is carried out according to the following (or equivalent) standards:

a) electromagnetic monitoring (magnetic flux scattering method) — [23] (longitudinal defects), [24] (transverse defects) or [25];

b) electromagnetic monitoring (eddy current method) — [26] or [27];

c) ultrasonic testing — [28] or [29] (longitudinal defects), [30] or [29] (transverse defects);

d) magnetic particle inspection — [17] or [18].

7.19.4 Standard samples

In systems of ultrasonic and electromagnetic monitoring, in addition to systems designed to check the wall thickness, standard samples with artificial defects (incisions) for which the requirements are indicated in Table A.17 (Appendix A) and in Figure B should be applicable for checking the equipment signal. 11 (annex B).

7.19.5 Documented procedures

The manufacturer may use any documented procedure to establish a threshold for acceptance of ultrasonic or electromagnetic monitoring, provided that the detection of artificial defects specified in Table A.17 (Annex A) is carried out dynamically under normal production conditions. The ability to detect such defects should be demonstrated dynamically. At the manufacturer’s choice, a demonstration of the ability of the monitoring system can be carried out in the production stream or out of the flow.

7.19.6. The level of rejection

Table A.17 shows artificial defects designed to establish the level of rejection of pipes with defects described in 7.17. Artificial defects used in automatic ultrasonic or electromagnetic monitoring should not be considered as defects with the dimensions specified in 7.17, or used by anyone other than the manufacturer as the sole basis for rejection.

7.19.7. Evaluation of the automatic control system

Imperfection that induces an indication equal to or greater than the reject level should be considered a defect if it can not be proved that this imperfection is not a defect described in 7.17. Defects must be removed in accordance with 7.19.10.

7.19.8 Records on the capabilities of the non-destructive testing system

The manufacturer must keep records of the verification of the NDT system (s), confirming their ability to detect artificial defects used to establish the sensitivity of the equipment.

Verification should include, at a minimum, the following:

a) calculation of the control area (ie the scanning plan), including verification of the wall thickness;

b) the applicability of such control for a given wall thickness;

c) repeatability of control results;

d) the orientation of the transducers, which ensures the detection of defects typical for the given production process (7.17);

e) documentation confirming that the defects typical for this production process can be detected using the non-destructive testing methods specified in 7.19.3;

f) parameters for setting the threshold.

In addition, the manufacturer must keep the following entries:

— working procedures of the non-destructive testing system;

— characteristics of equipment for non-destructive testing;

— information on the certification of personnel performing non-destructive testing;

— results of monitoring in a dynamic mode, confirming the ability of the system / operations of nondestructive testing in production conditions.

7.19.9. Assessment of indications

If an indication equal to or greater than the rejection level is received from an imperfection, the manufacturer may choose to evaluate it in accordance with this clause or recognize it as a defect and remove it in accordance with 7.19.10. Evaluation of the indications should be carried out by non-destructive testing experts, certified at level I, under the supervision of specialists certified at levels II or III, or experts certified at levels II or III. Evaluation should be performed in accordance with documented procedures.

If in the area where the initial indication was received, no imperfection was found and the reason for this indication could not be explained, the pipe should be rejected or re-tested along the entire length by the same control method or ultrasonic method. The non-destructive testing equipment at the manufacturer’s choice must be set to the same sensitivity level as the initial control or reduced sensitivity, but corresponding to the specified requirements.

To assess the identified imperfections, measure its depth in order to determine whether it is a defect in accordance with 7.17. The measurement is carried out as follows:

a) using a mechanical measuring device (eg depth gauge, caliper, etc.). Removing the metal by grinding or otherwise to facilitate measurement should not reduce the wall thickness below the allowable value. Sharp changes in wall thickness caused by grinding should be eliminated in accordance with 7.19.10;

b) the depth of imperfection can be measured by ultrasound (measuring the time of flight and / or amplitude of the signal or using another suitable method). Verification of ultrasound equipment must be documented and must confirm its ability to detect imperfections with the dimensions specified in 7.17 or more;

c) if the consumer and the manufacturer have not agreed on the evaluation of the results of non-destructive testing, either party may require the performance of destructive testing of products; further action should be taken in accordance with section C.4 (annex C);

d) for imperfections that were recognized as defects after the evaluation, actions in accordance with 7.19.10 shall be taken.

7.19.10 Removal of defects

Imperfections that meet the specified requirements and are permissible in size 7.17 may be left on the drill pipe body.

The bodies of drill pipes with hardening cracks should be rejected, except for the case when quenching cracks are located at the end of the landing. In this case, the end part of the pipes can be cut in accordance with the documented procedure.

Repair welding is not allowed.

On the body of the drill pipe with defects, in addition to quenching cracks, one of the following actions should be taken:

a) grinding or machining.

Defects should be completely removed by grinding or machining, with the remaining thickness of the wall being within the specified limits. Grinding must be carried out in such a way as to ensure a smooth transition of the cleaned surface to the contour of the pipe. If the stripping depth exceeds 10% of the specified wall thickness, the remaining wall thickness should be checked in accordance with 7.10. After removing defects, the site must be re-checked to confirm the completeness of defect removal. Repeated monitoring should be carried out as follows:

1) on the same equipment and with the same sensitivity as the initial control, or

2) another non-destructive testing method or a combination of methods having the same or higher sensitivity than the original non-destructive testing method.

If option 2) is used, the method or combination of non-destructive testing methods shall be documented and capable of demonstrating a sensitivity equal to or greater than the sensitivity of the original control method. In addition, when choosing option 2), the probability that there may be other overlapping defects may be taken into account.

Removing imperfections, including «ivory skin», grinding or machining over an arc of more than 60% of the circumference of the drill pipe body should not lead to a reduction in the outer diameter to a value less than the allowable minimum value;

b) pruning the defective area;

c) rejection.

7.20 Marking

7.20.1 General

Marking of drill pipe bodies must be performed by the manufacturer of drill pipe bodies in accordance with 7.20.2, if the drill pipe bodies are ordered as separate products. If the drill pipe manufacturer is produced by the drill pipe manufacturer, its marking may differ from that described in 7.20.2, provided that the traceability requirements are met.

At the choice of the manufacturer or at the request of the consumer, it is allowed to apply additional marking with paint or stamping. Marking by stamping is allowed only on the landing of drill pipe bodies. The marking marks must not overlap and should be applied in a way that excludes damage to drill pipes.

7.20.2 Order of marking with paint

The paint marking shall be applied on the outer surface of each drill pipe body at a distance of at least 0.6 m from either end. The order of paint application should be as follows:

a) DPB.

NOTE These letters indicate that the marking refers to the body of the drill pipe;

b) the name or trademark of the manufacturer of the drill pipe body;

c) the designation of this standard without the year of commissioning;

d) the date of manufacture (month and year) indicated by a three- or four-digit number, the first one or two digits of which mean a month, and the subsequent two digits the year of marking in accordance with section 7;

e) UF, if the size of the landing is different from those indicated in Tables A.13 or A.14 (Annex A);

f) the outer diameter of the pipe body, rounded to an integer value ;

g) the wall thickness of the pipe body, rounded to an integer value ;

h) the strength group of the drill pipe body;

j) additional SR requirements;

k) L2 or L3 (meaning PSL-2 or PSL-3, respectively), whichever is applicable;

1) the serial number of the drill pipe body (see 7.5 for traceability requirements).

Example — The drill pipe body (DPB) manufactured by Z according to GOST …, in July 2007 (707), with special landing dimensions (UF), external diameter 60,32 mm (60), wall thickness 7,11 mm (7), the strength group E, with the serial number Y has the following marking with the paint:

DPB Z GOST… 707 UF 60 7 E Y.

7.21 Minimum requirements for the equipment of the manufacturer of drill pipe bodies

The manufacturer of drill pipe bodies shall operate the equipment for disembarkation and / or for the thermal treatment of drill pipe bodies along the entire length, and also have appropriate equipment and be responsible for their weighing and marking. If the drill pipe manufacturer manufactures pipes with disembarkation or if the disembarkation and / or heat treatment are performed by a subcontractor, these operations should be carried out under the control and supervision of the drill pipe manufacturer, in accordance with the documented procedure.

The manufacturer of drill pipe bodies must have equipment for carrying out all required inspection and testing operations, or any of these operations may be carried out by a subcontractor outside the enterprise. When performing such work by a subcontractor, he must conduct them under the supervision and supervision of the manufacturer of the drill pipe bodies in accordance with the documented procedure.

7.22 Documentation requirements

7.22.1 Quality document

The manufacturer of drill pipe bodies must issue a quality document containing the following information for each item specified in the order:

a) the designation of this standard and the year of its approval;

b) the outer diameter and wall thickness of the pipe body, the type of embankment, the strength group of the drill pipe bodies, the type of heat treatment, the length and length deviations, and other additional requirements specified in the order;

c) an indication that the drill pipe bodies have been manufactured, subjected to inspection and testing in accordance with this standard and fully comply with its requirements;

d) the results of a chemical analysis (smelting, article and reanalysis, if necessary) indicating the mass fraction (%) of all elements for which this standard specifies requirements for containment, as well as other elements used by the manufacturer to provide the required mechanical properties;

e) the results of the tensile tests required by this standard, including yield strength, temporary resistance and elongation, with mandatory indication of the type and size of the samples;

f) the results of impact tests if they are required by this standard, including:

1) the requirement for shock work;

2) the size, location and orientation of the test specimens;

3) the temperature of the test;

4) the impact work, measured on each sample;

5) average stroke performance;

6) the proportion of the viscous component in the fracture of each sample (only for information);

g) the results of other additional tests specified in the order.

7.22.2 List of drill pipe bodies

The manufacturer of drill pipe bodies must provide the consumer with a list of products with the serial number and length each body of the drill pipe.

7.22.3 Electronic data interchange

The standard documentation (7.22.1 and 7.22.2), applied electronically in the electronic data interchange system or printed out from it, shall have the same legal effect as the documentation printed by the manufacturer of the drill pipe bodies. The content of such documentation must comply with the requirements of this standard and the current agreements between the consumer and the manufacturer regarding electronic data interchange.

7.22.4 Saving records

Table A.9 (Annex A) indicates the entries that must be saved. These records shall be kept by the manufacturer of the drill pipe bodies and provided at the request of the consumer within five years from the date of purchase of the drill pipe bodies from the manufacturer.

8 Requirements for locks

8.1 Information that a consumer must provide when placing an order for locks

8.1.1 When placing an order for locks manufactured in accordance with this standard, the consumer shall indicate in the order the following information:

1) standard	GOST …
2) the number	-
3) the type of threaded joint of locks provided for in this standard, or another type	8.2.5, Table A.1 (Annex A)
4) Drawing of the nipple of the lock, including the necessary detailing	Figure B.12 (Annex B)
5) drawing of the lock clutch, including the necessary detailing	Figure B.12 (Annex B)
6) delivery date and shipping instructions	-
7) the need for an inspection conducted by the consumer	appendix C
8) additional documentation	8.15

8.1.2 The consumer may, at his own discretion, specify the following requirements in the order:
1)	special dimensional deviation of dimensions		8.2.4
2)	type of stepped hole of the pin and / or coupling		Figure B.12 . (Annex B)
3)	type of special surface treatment of thread		8.4.5
4)	Need for threading a threaded thrust joint		8.4.6
5)	necessity of carbide surface hardening of the lock clutch: its appearance, location, dimensions and acceptance criteria		8.4.7
6)	type of threaded fuses		8.4.8
7)	the need for labeling		8.4.4
8)	the need to apply conservation grease		8.4.8
9)	additional labeling requirements		8.13
10)	Alternative requirements for impact testing		D.5 SR20 (annex D)
eleven)	level of requirements for products PSL-2 or PSL-3		annex E
8.1.3 Upon initial registration of the order for locks to be manufactured in accordance with this standard, for the manufacturer to develop the design documentation, the customer must indicate in the order the following information:
1)	outer diameter of pipe body	Table A.1 (Annex A)
2)	wall thickness of pipe body t	Table A.1 (Annex A)
3)	group of drill pipe body strength	Table A.1 (Annex A)
4)	type of threaded joint provided in this standard, or other type	8.2.5 and Table A.1 (Annex A)
5)	nipple length along the outer surface	6.2.6 and Table A.1 (Annex A)
6)	clutch length on outer surface	6.2.6 and Table A.1 (Annex A)
7)	the form of the shoulder under the elevator is conical or rectangular	6.2.2
8)	total length of nipple	Table A.1 (Annex A)
9)	total length of clutch	Table A.1 (Annex A)
10)	thread direction — right or left	8.2.5
eleven)	outer diameter of lock shanks before welding and final machining	8.2.4 and Figure B.12 (Annex B)
12)	inner diameter of lock shanks before welding and final machining	Figure B.12 (Annex B)
13)	angle of conical section of nipple — 35 ° or 18 °	Figure B.12 (Annex B)
14)	radius of conjugation of the outer surface of the nipple shank and the adjacent conical surface for a taper angle of 35 °	Figure B.12 (Annex B)

8.2. Dimensional requirements

8.2.1 General

All dimensions of the locks, indicated without any deviation, are the basic dimensions for the design and can not be measured when receiving or rejecting the products. The dimensions of locks not specified in this standard are set at the choice of the manufacturer, unless otherwise specified in the order.

8.2.2 Configuration

The lock configuration must match the one shown in Figure B.12 (Appendix B).

Upon agreement between the manufacturer and the customer, the locks can be manufactured with a stepped hole in the pin and / or coupling (figure B.12).

8.2.3. Type of locks

Locks shall be manufactured with a threaded thrust joint of the types specified in Table A.1 (Annex A), except as provided in 8.2.5.

8.2.4 Dimensions of locks

Dimensions and limit deviations of the dimensions of the locks (figure B.12) must correspond to the dimensions and limit deviations specified in Table A.1 and / or order.

Outside diameter , shown in Table A.1 (Annex A) and in Figure B.1 (Annex B), is the outside diameter of the welded neck of the drill pipe after welding the lock to the body of the drill pipe and final machining. The outer diameter before welding should be set by the drill pipe manufacturer.

Internal diameter of the lock clutch must be installed by the drill pipe manufacturer, but should not be less than the inside diameter of the pin nipple [Figure B.1 (Annex B)].

The outer and inner diameters of the locks (D and ), indicated in Table A.1 (Annex A), provide the coefficient of strength of the drill pipe with a torsion of at least 0.8. In the order, locks may be indicated with other external and internal diameters, for example for combined drill pipes or columns of pipes of different external diameters, while the torsional strength of the drill pipe may be different (recommendations for calculating the strength coefficient according to the standard [3]) .

8.2.5 Threaded thrust connection

Dimensions and dimensional deviations of the dimensions of the threaded joint of the locks shall comply with the dimensions and limit deviations specified in the standards [1], [2] or GOST 28487 **. A threaded right-hand threaded connection is considered standard. Other types of threaded joints are allowed, if specified in the order. In this case, dimensions, dimensional deviations and torsional strength must be agreed between the consumer and the manufacturer.

8.3 Material requirements

8.3.1 Requirements for chemical composition

The chemical composition of the steel locks shall be as specified in Table A.4.

8.3.2. Mechanical tensile properties

The mechanical properties of the locks in the tensile test shall meet the requirements specified in Table A.5.

The yield point of the pin nipple must correspond to the load causing an elongation of the calculated sample length of 0.2%.

NOTE — Compliance with the tensile properties of the lock clutch is confirmed by a hardness check.


Additional requirements for PSL-3 are given in Appendix E.

8.3.3. Hardness requirements

The hardness of the lock clutch must be between 285 HBW and 341 HBW.

This requirement does not apply to the wall thickness variation for PSL-3 (E.3, annex E).

Additional requirements for PSL-3 are given in Appendix E.

8.3.4 Shock Performance Requirements

The impact work of the impact test for locks shall not be less than the values specified in Table A.8 (Annex A). For one of the samples, impact work is allowed below the required minimum mean impact work, but for any sample, the shock is not allowed to work below the minimum value allowed for a single sample.

Additional requirements for PSL-3 are given in Appendix E.

8.4 Method of production

8.4.1 Processes requiring validation

Processes corresponding to the final operations performed in the manufacture of locks that determine their compliance with the requirements of this standard (except for the requirements for chemical composition and size) must undergo a validation procedure.

Processes that require validation are:

— heat treatment;

— hard alloyed surface hardening, when applied.

8.4.2 Workpiece

Locks should be made of forgings or hot-rolled billets.

8.4.3 Heat treatment

Heat treatment must be carried out in accordance with the documented procedure. The procedure should indicate the permissible number of repeated heat treatment operations.

Locks should be hardened and tempered.

8.4.4 Threading

If the order does not specify otherwise, the threaded joint of the locks shall comply with the requirements of standards [1], [2] or GOST 28487 ** . If it is specified in the order, control marks are put on the outer surface of the pin nipple in accordance with the requirements of standards [1] and [2].

8.4.5 Thread surface treatment to reduce seizing

To reduce seizing when screwing or unlocking locks, a special coating is applied to the thread surface, for example phosphate, copper or other suitable coating. If the order does not specify otherwise, the type (material) and method of coating is chosen by the manufacturer. Coating should be carried out in accordance with the documented procedure.

8.4.6 Running

If this is specified in the order, the manufacturer must be run-in the threaded studs in accordance with the documented procedure.

Running consists of triple screwing and unscrewing the joint of the lock with the specified torque and using the corresponding threaded grease [3].

8.4.7 Carbide surface hardening

As agreed between the consumer and the manufacturer, carbide-tipped carbide surface hardening of the clutches of locks (figure B.1, appendix B). The type of hardening, its location, dimensions, dimensional deviations and acceptance criteria must be specified in the order, and its application must be carried out in accordance with the documented procedure.

NOTE — When carbide surface hardening is performed, the length of the outer surface of the lock clutch, available for key gripping, is reduced.

8.4.8 Protecting threaded connections

When loading and unloading operations and transporting locks, the possibility of damage to the surface of the thread, the stop surfaces and the ends of the shanks should be avoided.

If the order does not specify otherwise, the manufacturer shall ensure that the screw joints of the locks are protected for the period of transportation and storage and that the type of threaded fuses is selected .

If specified in the order, a conservation grease must be applied to the thread surface, the stop surfaces and the ends of the lock shanks. The type of lubricant is chosen by the manufacturer of the locks.

8.5 Traceability

The manufacturer of the locks shall establish and follow procedures ensuring the preservation of the identification of the melting of all locks manufactured in accordance with this standard. The identification of the lot must be maintained before the completion of all necessary tests for the lot and documentation of compliance with the requirements. Procedures should provide for ways to trace each lock to the appropriate melting and to the results of chemical analysis, mechanical testing and control.

NOTE — Since locks made from the same melting can be heat-treated in different batches, there may be more than one record of the results of mechanical tests for one melting.

8.6 Inspection and testing. General Provisions

8.6.1 Verification, verification and calibration of control and test equipment

The manufacturer shall establish and document the frequency and procedures for checking, verifying and calibrating the equipment (including cases of untrusted and uncalibrated conditions and their effect on products) in order to confirm the conformity of products to the requirements of this standard.

8.6.2. A batch of heat treated articles

The batch must consist of nipples or couplings of locks with the same specified dimensions, subjected to thermal treatment under the same regime as part of a continuous process (or batch process). A batch of products shall be made of steel of the same melting or different melting combined in accordance with a documented procedure ensuring compliance with the requirements of this standard.

8.7 Control of chemical composition

8.7.1 General

The chemical analysis of steel shall be carried out by the steel manufacturer or manufacturer of locks on samples taken from hot-rolled billets, forgings, non-finished or finished products.

8.7.2 Product Analysis

Each steel melting used to make the locks must be quantified to determine the phosphorus and sulfur content, as well as other elements used by the manufacturer to provide the required mechanical properties.

8.7.3 Method of analysis

Chemical analysis of the steel can be carried out by any method commonly used for this purpose, such as emission spectroscopy, X-ray emission spectroscopy, atomic absorption method, sample combustion methods or wet analytical procedures, etc. Applicable methods of equipment calibration should provide traceability to approved standard samples materials. In disputable cases, chemical analysis is carried out in accordance with standards [21] or [22].

8.8. Tensile test

8.8.1 Test method

The tensile test is carried out at room temperature in accordance with GOST 10006 or standard [6].

8.8.2 Verification of test equipment

Not earlier than 15 months before the test, verification of the test machines in accordance with the standard [7] or [8] must be carried out. Not earlier than 15 months before the test, the extensometer should be checked in accordance with the standard [9] or [10]. The records should be stored in accordance with 6.17.4 and Table A.9 (Appendix A).

8.8.3 Samples for testing

For tensile testing of the lock pin after the final heat treatment, one sample is taken, as shown in Figure B.13 a (Annex B). The sample can be taken from a non-finished product (i.e. before tapping, machining or surface hardening).

Upon agreement between the consumer and the manufacturer, tensile tests for the lock couplings must be carried out. In this case, the test conditions must also be agreed.

The tests are carried out on cylindrical specimens with a diameter of 12.5 mm.

If the nipple section of the sampling section is not sufficient for making a sample with a diameter of 12.5 mm, samples with a diameter of 9.0 mm or 6.5 m can be used. Samples of the largest possible diameter should be used.

If the nipple section of the sampling section is insufficient to produce a 6.5 mm diameter sample with a design length of 25.0 mm, a tensile test is not required, but a hardness test for the nipples in accordance with 8.9 should be carried out.

8.8.4. Test frequency

The periodicity of the tensile tests for nipples of locks shall be as specified in Table A.10 (Annex A).

Additional requirements for PSL-3 are given in Appendix E.

8.8.5. Tensile test for control of melting

For each steel melting used by the manufacturer to manufacture locking nipples in accordance with this standard, one tensile test shall be carried out as a control test. The records for this test should be available to the consumer.

A control test of melting can also be considered a test for a batch of products.

8.8.6 Retest

If the results of the initial tensile test do not meet the requirements, the manufacturer can test two additional samples from the same pin nipple. If both additional samples pass the test, then the lot must be accepted.

If the test results, at least one of the additional samples do not meet the requirements, the manufacturer can test samples from three additional nipples from the same lot. If the samples from all three additional nipples have passed the test, the lot must be accepted. If at least one of these samples does not meet the established requirements, the lot must be rejected. The rejected lot can be re-heat treated and tested as a new batch.

8.8.7 Defective samples

Samples with imperfections in the material or inadequate preparation found before or after the tests can be rejected and replaced with other samples that must be accepted as initial ones. Samples should not be considered defective only because the results of their tests do not correspond to the required properties in the tensile test.

8.9 Hardness test

8.9.1 Method of verification

The hardness test for the wall thickness is carried out according to Brinell’s method at room temperature according to GOST 9012 or standard [11].

8.9.2 Samples for control

The sample for hardness control is taken from the lock clutch after the final heat treatment so that one print can be made as shown in Figure B.13 a (Appendix B). Samples can be taken from non-finished products (i.e. before threading, machining or surface hardening).

If a portion of the lock pin, said sampling (8.8.3), it is impossible to produce the desired pattern for the tensile test, then the control should be performed on the hardness of the pin, as shown in Figure B.13 b (Annex B).

8.9.3 Periodicity of control

The periodicity of the hardness control for the lock couplings shall be as specified in Table A.10 (Annex A).

If the lock nipple section is not sufficient for sampling for the tensile test and a hardness test is required for the nipples, this test should be carried out at the same frequency as the tensile test (Table A.10).

8.9.4 Control of hardness for melting

For each steel melting used by the manufacturer to manufacture locks of the locks (and if necessary for the nipples), a single hardness test shall be carried out as a control test. The records for this control should be available to the consumer.

Hardness testing for melting can also be considered a test for a batch of products.

8.9.5 Repeated inspection

If the hardness of the lock clutch (or nipple) representing the batch does not meet the requirements, then a repeated hardness check can be carried out. For this, two additional measurements should be made at a distance equal to approximately three print diameters on either side of the initial inspection site. If the results of both additional measurements meet the specified requirements, the lot must be accepted.

If the result of at least one of the additional measurements does not meet the specified requirements, the manufacturer can choose for additional control three couplings from the same lot. If the control results for all three couplings meet the requirements, then the lot must be accepted. If at least one of the control results does not meet the established requirements, then the lot must be rejected. The rejected batch can be re-heat-treated and subjected to control as a new batch.

8.10 Impact bending test

8.10.1 Test method

The test should be subjected to a set of three longitudinal samples taken from the coupling and pin nipple. The impact test is carried out according to the Charpy method on samples with a V- notch at a temperature of (21 ± 3) ° C in accordance with standards [6] and [14]. Alternative standard test temperatures are specified in D.5 SR20 (annex D), temperatures for PSL-3 are in table A.8 (annex A).

It is allowed to perform tests at a lower temperature than the set temperature, provided that the performance requirements for the impact set for the specified temperature are met.

Determination of the proportion of the viscous component in the fracture of the samples after the tests should be carried out in accordance with the standard [14].

Additional requirements for PSL-3 are given in Appendix E.

8.10.2 Dimensions and orientation of samples

Specimens for impact test with a V -shaped notch taken from the coupling and the lock pin after the final heat treatment, as shown with B.13 (Appendix B). Samples can be taken from non-finished products (i.e. before threading, machining or surface hardening).

For the impact bend test, select the largest possible size sample from Table A.11 (Annex A) for the minimum outer diameter (if necessary rounded to the nearest smaller diameter) and the wall thickness of the test section of the product. The size of the smallest sample should be 10.0x5.0 mm.

Samples are taken in the direction parallel to the axis of the lock or nipple of the lock, the incision of the specimen should be oriented radially, as shown in Figure B.13 c (Appendix B).

8.10.3. Test frequency

The periodicity of the impact test for couplings and nipples of locks shall be as specified in Table A.10 (Annex A).

Additional requirements for PSL-3 are given in Appendix E.

8.10.4 Control test for melting

For each steel melting used by the manufacturer of the locks, one impact test shall be carried out as a control test. The test records must be available to the consumer.

A test for melting can also be considered a test for a batch of products.

8.10.5 Repeated trials

If the test results do not meet the requirements of 8.3.4, but if the impact of only one of the samples is below the required minimum value for a single sample, the manufacturer may, at his discretion, reject the lot or re-test an additional set of three samples taken from the same sample. The impact performance of all three additional samples should be equal to or greater than the minimum average impact work specified in Table A.8, or the lot must be rejected. If there is not enough material in the original sample for making additional samples, samples from another nipple or a lock clutch from the same batch are allowed.

If, during the initial test, the impact of two samples is below the required minimum value for a single sample, the manufacturer may reject the lot or re-test additional sets of three samples taken from each of the three additional products of the same lot. If the results of testing additional sets of samples do not meet the requirements of the initial test, the lot must be rejected.

The rejected lot can be re-heat treated and tested as a new batch.

8.10.6 Defective samples

Samples with material imperfections or poor-quality preparations found before or after testing can be rejected and replaced with other samples that must be accepted as initial ones. Samples should not be considered defective only because the results of their tests do not meet the minimum impact performance requirements.

8.11 Imperfections and defects

8.11.1 General

Locks must not have defects defined in this standard. Marking by stamping should not be considered a defect.

8.11.2 Surface defects

On the surface of the thread and the corresponding opposite surface (the outer surface opposite the internal thread of the coupling and the inner surface opposite the external thread of the pin) and on the stop surfaces of the threaded connection of the locks, any imperfection must be considered a defect.

On surfaces not mentioned above:

— any linear imperfection should be considered a defect;

— Any nonlinear imperfection, the size of which is more than 25% of the circumference or the depth of more than 3.2 mm, should be considered a defect.

8.11.3. Quenching cracks

Quenching cracks should be considered as defects.

8.11.4 Process control plan

The manufacturer, taking into account the features of the production technology and requirements 8.11, must develop and comply with a process control plan that ensures compliance with the requirements specified in this subsection.

8.12 Non-destructive testing

8.12.1 General

All non-destructive testing operations (other than visual inspection) provided for in this standard shall be conducted by personnel certified in accordance with [15] or [16].

If this is specified in the order, non-destructive lock control performed by the consumer and / or control in the presence of the customer representative is carried out in accordance with Annex C.

The control carried out according to 8.12 shall not be considered as ensuring the obligatory conformity of products to the requirements established in 8.11.

The manufacturer shall establish the necessary periodicity of testing non-destructive testing equipment in order to confirm the conformity of the products to the requirements of this standard.

If equipment that has been calibrated or checked in accordance with the provisions of this standard has been exposed to unusual or unfavorable conditions of use, which could compromise its accuracy, then it must be recalibrated or checked before further use of the equipment.

8.12.2 Wet Magnetic Particle Inspection

The outer and inner surfaces of each lock after heat treatment and threading are subjected to a wet magnetic particle inspection to detect longitudinal and transverse imperfections in accordance with the standard [17] or [18]. The control should be carried out in accordance with the documented procedure. The concentration of magnetic powder particles is checked every 8 hours or at the beginning of each shift. The minimum intensity of ultraviolet radiation on the monitored surface should be at least 1000 μW / cm .

8.12.3 Removing defects

Defects should be the basis for rejecting locks or completely removed by grinding or machining in accordance with a documented procedure that ensures compliance with requirements 8.2. All grinding operations must be performed with smooth transitions. To check the completeness of the removal of defects after grinding or machining, the locks must be re-checked in the same way as these defects were found.

8.13 Marking

8.13.1 General

The locks shall be marked with the locks manufacturer in accordance with 8.13.2 if locks are ordered as separate items. If locks are manufactured by the drill pipe manufacturer, the locks can be marked in a manner different from that described in 8.13.2, provided that the traceability requirements are met.

At the choice of the manufacturer or on request specified in the order, the locks can be marked with additional markings. Marking of locks in the recognition slot and milled grooves should be carried out in accordance with the requirements of the standard [3] .

The marking marks must not overlap and must be applied in a way that excludes damage to the locks.

8.13.2 Marking with marks

On the outer surface of the nipple and the clutch of each lock, the following marking shall be marked by marking with 6-PRZ or 8-PRZ fonts according to GOST 26.008 **:

a) the name or trademark of the manufacturer of the locks;

b) left thread direction — LH, when used;

c) the type of threaded joint in accordance with Table A.1 (Annex A) or for connections not specified in Table A.1, the designation agreed between the manufacturer and the user ;

d) the designation of this standard, without the year of commissioning;

e) the date of manufacture (month and year), indicated by a three- or four-digit number, the first one or two digits of which mean a month, and the next two digits — the year, during which the marking is marked in accordance with Section 8;

f) additional SR20 requirements when applied;

g) L2 or L3 (meaning respectively PSL-2 or PSL-3), whichever is applicable;

h) an identification code containing the melting number and batch number by the numbering adopted by the lock manufacturer (traceability requirements — see 8.5) .

Example: A lock made by Z, with the left-hand threading LH, with threaded thrust connection NC50, according to GOST… in August 2007 (807), with identification code XY (X — melting number, Y — batch number) must have the following marking (in one or more lines):

Z LH NC50 GOST… 807 XY.

8.14 Minimum requirements for the manufacturer of locks

The manufacturer of locks shall have equipment for heat treatment and / or tapping of locks, and also bear and be responsible for the appropriate equipment for marking locks. If the lock manufacturer buys the blank for locks in a heat-treated condition, or the thermal processing of the locks or tapping is performed by a subcontractor, then these operations must be carried out under the control and supervision of the lock manufacturer in accordance with the documented procedure.

The manufacturer of locks shall have equipment for carrying out all required control and testing operations, or any of these operations may be carried out by a subcontractor outside the enterprise. If the work is performed by a subcontractor, it must conduct them under the control and supervision of the manufacturer of the locks in accordance with the documented procedure.

8.15 Documentation requirements for locks

8.15.1 Quality document

The locksmith shall issue a quality document containing the following data for each item specified in the order:

a) the designation of this standard, on which the locks were made, with the year of its commissioning;

b) the outer and inner diameters of the locks, the lengths of the nipple and the coupler over the outer surface;

c) type of threaded joint, type of heat treatment and other necessary requirements specified in the order;

d) an indication that the locks have been manufactured, subjected to inspection and testing in accordance with this standard and fully comply with its requirements;

(e) The results of the chemical analysis, indicating the mass fraction (%) of all elements for which this standard specifies requirements for containment, as well as other elements used by the manufacturer to provide the required mechanical properties;

f) the results of the tensile tests required by this standard, including yield strength, temporary resistance and elongation, with mandatory indication of the type and size of the samples;

g) the results of impact bending tests, if required by this standard, including:

1) the requirement for shock work;

2) the size, location and orientation of the test specimens;

3) the nominal temperature at which the test was carried out;

4) the impact work, measured on each sample;

5) average stroke performance;

6) the proportion of the viscous component in the fracture of each sample (only for information);

h) the results of the hardness test (including the control method, acceptance criteria, and sample location);

i) the results of any other tests for the additional requirements specified in the order.

8.15.2 Electronic data interchange

Mandatory documentation (8.15.1), applied electronically in the electronic data interchange system or printed out from it, has the same legal effect as the documentation printed by the manufacturer of the locks. The content of such documentation must comply with the requirements of this standard and the current agreements between the consumer and the manufacturer regarding electronic data interchange.

8.15.3 Saving records

Table A.9 (Annex A) indicates the entries that must be saved. These records shall be kept by the manufacturer of the locks and provided at the request of the consumer within five years from the date of purchase of the locks from the manufacturer.