GOST R 50278-92

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  ГОСТ Р 50278-92

GOST R 50278−92 drill Pipe with welded locks. Specifications (with Change No. 1)

GOST R 50278−92

Group В62

STATE STANDARD OF THE RUSSIAN FEDERATION

OF DRILL PIPE WITH WELDED LOCKS

Specifications

Drill pipes with weld-on tool joints. Specifications

OKS 23.040.10
OKP 13 2402, 2409 13

Date of introduction 1994−01−01

Preface

1 DEVELOPED AND INTRODUCED by the Ministry of metallurgy of the USSR and the Ministry of oil and gas industry of the USSR

2 APPROVED AND put INTO effect by the Resolution of Gosstandart of Russia from September, 16th, 1992 N 1189

3 INTRODUCED FOR THE FIRST TIME

4 EDITION (may 2010) with amendment No. 1, approved in April 2008 (7−2008 IUS), Amendment (ICS 6−2002)

INFORMATION DATA

REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS

This standard applies to seamless steel pipes with upset ends and welded them locks designed for the construction of oil and gas wells.

Climatic conditions of use, from 1to 11according to GOST 16350.

Locks for stud manufactured in accordance with GOST 27834.

1 Main parameters and dimensions

1.1 Drill pipes with welded locks should be manufactured with three types of upset ends:

PV — with inner landing;

PK — combined with planting;

MON — with outdoor planting.

In accordance with the order pipe of all types shall be manufactured with locks, having a rectangular or tapered shoulder under the Elevator, and with right-or left-hand thread (figure 1).

G — identification band for locks with left-hand thread

Figure 1

1.2 the Assortment of finished drill pipes with welded locks should correspond to those in tables 1 and 2.

Table 1 — Grades of drill pipes with welded locks of grades D and E

Dimensions are in millimeters

Table 2 — Grades of drill pipes with welded locks of grades L, M and R

Dimensions are in millimeters

1.3 Pipe with welded locks should be made of three groups of lengths according to table 3.

Table 3

1.4 tolerances for size and mass of the tubes shall not exceed:

the outside diameter of the pipe:

±0,8 mm — with internal diameter up to 114 mm incl.;

% — with a nominal diameter of 114 mm. St

May increase the outer diameter of pipes in excess of positive tolerance of up to 1.0 mm for a length of not more than 125 mm beyond the transition phase of the landing. For drill pipe with external upset steel grades D and E may increase the outer diameter of pipes in excess of positive tolerance of up to 2.0 mm over a length of no more than 125 mm beyond the transition phase of the landing;

wall thickness minus 12,5%.

Positive deviations in wall thickness is limited by the tolerances on outside diameter and mass of one pipe;

by weight of one pipe %.

(Changed edition, Rev. No. 1 Amendment).

1.5 the Curvature of the pipe for a transition area of landing at a distance of 125−150 mm should not exceed 1 mm per 1 m length.

The overall curvature of the pipe measured on the middle of the pipe, shall not exceed 1/2000 of the length of the pipe.

1.6 Geometrical dimensions of the upset ends of pipes after mechanical processing (boring, milling and trimming) for welding the locks shall conform to figure 2 and table 4 for pipe strength group D and E and figure 3 and table 5 for strength group L, M, R.

And internal planting; B — a combined landing; In — outdoor landing

Figure 2

Figure 3

Table 4 — Geometrical dimensions of the upset ends of the pipe strength groups D and E weld locks

Dimensions are in millimeters

Table 5 — Geometric dimensions of upset ends of pipes of grades L, M, R weld locks

Dimensions are in millimeters

1.7 designation of drill pipes with welded locks should include: symbol size according to tables 1 and 2, group strength, group lengths and the designation of this standard.

Examples of symbols:

The drill pipe with inner landing, a nominal diameter of 102 mm, a wall thickness of 8.4 mm of steel strength group D, 2nd group lengths:

Pipe PV 102х8 D 2 GOST R 50278−92

The drill pipe combined landing, a nominal diameter of 114 mm, a wall thickness of 8.6 mm of steel strength group E 3rd group lengths:

Pipe PC 114х9 E 3 GOST R 50278−92

Same with external upset:

Pipe PN 114х9 E 3 GOST R 50278−92

Same for pipes with a tapered shoulder under the Elevator:

Tube CPN 114х9 E 3 GOST R 50278−92

The same pipe on the left tool-joint thread:

Pipe PIT 114х9 E 3 GOST R 50278−92

Same for pipes with a tapered shoulder under the Elevator and left tool-joint thread:

Pipe LKN 114х9 E GOST R 50278−92

For pipes with conical coupling shoulder of the castle in the symbol added To the letter before the designation of the type of landing, and for marking the pipe on the left tool-joint thread — the letter L.

2. TECHNICAL REQUIREMENTS

2 Technical requirements

2.1 Pipe shall be manufactured in accordance with the requirements of this standard for technological regulations approved in the prescribed manner.

2.2 On the inner and outer surface of tubes should not be captured, shells, sunsets, bundles, cracks, Pisochyn and flaws.

Allowed cutting and Stripping these defects only along the pipe axis, provided that the cutting and cleaning do not take the thickness of the wall for limiting the negative deviations.

Welding, zachekanka or sealing defects are not allowed.

In places where wall thickness can be measured directly, the depth of the defective places may exceed the maximum negative deviation while maintaining minimum wall thickness, defined as the difference between the nominal thickness of the pipe and limit it to negative deviation.

Allowed some minor nicks, dents, risks, thin layer of dross and other defects due to the method of production, if they do not take wall thickness outside negative deviations.

2.3 the planted Surface of the tube and transfer it to the part wall thickness should not have sharp ledges.

2.4 Pipes shall be manufactured from steel of strength group D, E, L, M and R.

Mass fraction of phosphorus and sulfur in steels should be:

not more than 0.035% for each pipe strength groups D, E, L;

not more than 0,020% each for pipes of grades M and R.

2.5 Pipe all grades must be heat treated along the entire length of the landing after all.

2.6 Mechanical properties of pipe metal after heat treatment shall be as given in table 6.

Table 6

2.7 the Zone of the weld after removal of the Burr needs to be subjected to a heat treatment. Area of heat treatment (annealing, normalizing) must cover the area of weld heat-affected zone leave shall not extend beyond the cylindrical part of the upset ends of pipes and nipples and lock couplers.

2.8 External and internal surfaces of welded joints shall be machined the entire length of the cylindrical part of the upset ends of pipes and nipples and lock couplers to the dimensions given in tables 1 and 2. When machining a gouge in the pipe body at the inner and outer surfaces are not allowed. On the inner surface of the welded joint is allowed the trail with a big step from the exit of the cutting tool, does not extend beyond the upper tolerance of the inner diameter of a welded joint.

Roughness of the machined exterior surfaces shall be not more than 80 µm, the interior surfaces — not more than 130 µm according to GOST 2789.

2.9 Weld must be subjected to a bending test.

2.10 the Mutual displacement of the pipe outside surface and the outer surface of the tool joint parts should not exceed 1.2 mm.

2.11 the Marking shall meet the requirements of GOST 10692 with additions.

2.11.1 On the outer surface of the cylindrical part of the landing of each pipe from the valve lock needs to be clear labelling stamps in a font not less than 6 — PR 3 according to GOST 26.008.

The marking is applied by impact printing or by knurling in the following sequence:

trademark of the manufacturer;

nominal diameter, mm;

conventional wall thickness (integer), mm;

group strength;

the month and year (last two digits);

room tubes.

2.11.2 each tube at a distance of not less than 1 m from the valve lock along the path marked stable light color.

Character height of labeling is selected depending on pipe diameter, but not more than 50 mm and applied in sequence:

trademark of the manufacturer;

the type of pipe (PV, PC, PN);

nominal diameter, mm;

conventional wall thickness, mm;

group strength;

the length of the pipe, cm;

weight of pipe in kg.

2.12 the Packaging must meet the requirements of GOST 10692 with additions.

2.12.1 Thread of the nipple and coupling and surface resistant face and shoulder are welded locks should be protected from damage metal safety details. It is possible to manufacture safety parts from other materials that protect the above elements are welded locks.

2.12.2 When nevinchany safety details thread and the thrust surface of the welded locks should be covered with anti-corrosive lubricant or working oil in accordance with the requirements of GOST 9.014.

2.12.3 as required pipe must have a preservative coating the outer surface providing protection from corrosion.

2.12.4 Pipe up the packages with weight not more 5 tons (at the request of the consumer not more than 3 MT) rolled wire with diameter not less than 6 mm according to GOST 3282. In one package should be pipe same batch.

2.13 fatigue of drill pipes of all grades shall be not less than 16 kg/cm.

3. ACCEPTANCE

3 Acceptance

3.1 Pipe take parties. The number of pipes in the lot shall be not more than 200 PCs.

Each lot shall consist of pipe of the same size, same wall thickness and strength and be accompanied by a document certifying the conformity of their quality with the requirements of this standard and containing:

the name of the manufacturer;

the name of the consumer;

type, nominal diameter, wall thickness in millimeters;

group strength, number of melt, the sulphur and phosphorus contents for all members of the party heats;

numbers of tubes (from — to for each heat);

the length of the pipe in meters;

the number of tubes in the batch;

the weight of the batch;

the results of the mechanical and technological tests;

for more information;

the direction of the thread in the manufacture of pipes with left-hand thread;

the designation of this standard.

3.2 To check the conformity of the pipes with the requirements of this standard of conduct acceptance inspection, acceptance testing and periodic testing.

3.3 Acceptance control is subjected to each pipe for compliance with the requirements of paragraphs.1.2−1.5; 2.2; 2.3; 2.8−2.12.

3.4 acceptance testing is subjected to a pipe in accordance with the requirements of the PP.2.4; 2.5; 2.11.

3.5 Upon receipt of unsatisfactory results of the acceptance testing at least one of the indicators it is carried out re-tests on twice the number of tubes taken from the subjected to tests from the same batch.

The results of repeated tests spread to the entire party.

3.6 Periodic inspection of the pipe is subjected that have passed acceptance tests. The test is performed not less than once every three years under the program and methodology of tests.

3.7 Mass fraction of sulfur and phosphorus should be checked from each heat. For pipes made from metal other enterprises mass fraction of sulfur and phosphorus is satisfied by a quality document from the manufacturer of the metal.

3.8 Verification of the mechanical properties of the metal pipe should be one pipe of each size from each heat, a member of the party.

3.9 Each pipe should be inspected by nondestructive method for the presence of transverse defects in planted at the ends of the outer and inner surface, across the longitudinal length of the pipe and defects in the weld zone after welding and machining.

4. TEST METHODS

4 test Methods

4.1 External and internal surfaces of pipes are checked visually.

4.2 the Depth of the defects check adproval or another way in one or three places.

4.3 Verification of geometrical parameters of pipes is carried out using universal measuring instruments or special devices that provide the necessary measurement accuracy, in accordance with normative-technical documentation.

4.4 Inner diameter zone of a welded joint is controlled by a cylindrical mandrel with a diameter equal to 3.2 mm, in accordance with table 1 and a length of 100 mm. Mandrel should be free to take for a length of 500 mm from the end of the castle.

4.5 the Curvature at the end portions of the pipe is checked with a straight edge length of 1000 mm type SHD-2 (GOST 8026), a set of probes (TU 2−034−225). To measure visually select the portion of the pipe with the maximum curvature. The overall curvature is controlled by the measuring line (GOST 427) and stretched strings (fishing line) applied to the outer surface of the pipe from the side of the concavity.

When measuring the curvature of the pipe length of the planted part is not taken into account.

4.6, the Mutual displacement of the pipe outside surface and the outer surface of the tool joint parts is controlled according to the scheme shown in figure 4.

Figure 4 — Scheme of control mutual displacement of the locking parts and the pipe body

A — tube; B — detail of the castle; In the indicator; G — support

Figure 4 — Scheme of control mutual displacement of the locking parts and the pipe body

Difference indicator values for one revolution of the tube should not exceed 2.4 mm.

Allowed to use other means, providing reliable control.

4.7 determination of mass of the pipes are produced on special equipment for weighing with precision, providing the requirements of this standard. Allowed determination of the mass of the pipes calculated.

4.8 the Content of sulfur and phosphorus in steel is determined according to GOST and GOST 12347 12345. Samples are taken during the casting of steel according to GOST 7565.

4.9 the tensile Test is carried out according to GOST 10006 short longitudinal samples.

To check the mechanical properties of the metal check the bottoms cut out one sample.

Samples should be cut out from the pipe method, not causing changes in the structure and mechanical properties of the metal.

Allowed to straighten the ends of the sample gripping jaws of the testing machine.

4.10 the impact Test performed according to GOST 9454.

4.11 Verification of the weld joint bending press bending is carried out at eight points around the perimeter with a force that creates a tension of 0.8 .

4.12 non-destructive testing of pipes, planted all in the zone of welded joints is ultrasonic or magnetic particle methods according to normative-technical documentation.

5. TRANSPORTATION AND STORAGE

5 Transportation and storage

5.1 Transportation and storage should meet the requirements of GOST 10692 with the following additions.

5.1.1 carload of Pipe shipped in the same car should be the pipe only one type of landing, one conditional diameter, the same strength group, one direction thread.

Allowed the shipment in one car of pipe of different sizes, provided their separation.

5.1.2 the Group conditions of storage — 7 (jf1) according to GOST 15150.

6. OPERATING INSTRUCTIONS

6 operating Instructions

6.1 Drill pipe with welded locks installed in the drill string and is connected at the top with the leading pipe in the lower part with a weighted drill pipes and the bit or tool.

6.2 Requirements on operation and repair of drill pipes installed in the normative-technical documentation.

7. MANUFACTURER’S WARRANTY

7 manufacturer’s Warranty

The manufacturer must guarantee the conformity of drill pipes with welded locks with the requirements of this standard under the conditions of transportation, storage and operating rules, determines the limiting design value of the axial tensile load, bending and torque the pipe body.