Some standard content:
ICS75.180.10
Registration number: 6970—2000
Petroleum and natural gas industry standard of the People's Republic of ChinaSY/T 55392000
Assessment procedure for OCTG quality2000-03-31 Issued
National Bureau of Petroleum and Chemical Industry
2000-10-01 Implementation
SY/T 5539—2(HH
2 References
3 Sampling and inspection
4 Determine whether the sampling population can be rated5 Quality evaluation inspection and scoring rules
6 Comprehensive evaluation
7 Treatment of quality evaluation results
Appendix A (suggestive appendix) Registration form for quality evaluation and inspection results of OCTG products (format).+..+
SY/T 5539—2000
This standard is a revision of SY/I5539—92 “Product Quality Evaluation Method for Special Petroleum Pipes”. When revising this standard, the table of contents and preface were added according to GB/I1.1-1993 “Guidelines for Standardization Work Unit 1: Rules for Drafting and Presentation of Standards Part 1: Basic Regulations for Standard Writing”, and the standard format was modified. This standard also made major revisions to the following major contents: - The sampling and inspection plan was re-formulated according to (GB/T14437--1997 “Product Quality Supervision Number Sampling Inspection Procedure and Sampling Plan”.
- The quality characteristics of oil well pipes were re-determined and divided; - The scoring method of quality characteristics was modified, and the comprehensive evaluation results were revised. The form and method of determination have been modified. 1. The content of basic physical performance evaluation of oil pipes and casing has been added. - The scoring criteria for product quality characteristics have been modified. From the date of entry into force, this standard will also replace SY/T5539--92. Appendix A of this standard is a prompt appendix
This standard is proposed by China National Petroleum Corporation: This standard is under the jurisdiction of Shidi Pipe Professional Standardization Committee: The drafting unit of this standard: Petroleum Pipe Research Institute of China National Petroleum Corporation. The main drafters of this standard are Ji Lingkang, Zhao Kefeng and Li Pingquan. This standard was first issued in February 1993, and this is the first revision. 1 Scope
Petroleum and Natural Gas Industry Standard of the People's Republic of China Oil and Pipe Product Quality Evaluation Method
Assessment This standard specifies the quality evaluation method of oil and pipe products. SY/T 5539--2000
Replaces SY7T5539-92
This standard is applicable to the quality evaluation of oil well pipe products such as general-purpose oil pipes, casings, drill pipes, integral weighted drill pipes, drill chains, drill tool stabilizers, drill pipe joints and conversion joints. 2 Reference standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid: All standards will be revised, and the parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T9253.2-1999 Thread measurement, testing and inspection of casing, tubing and line pipe in petroleum and natural gas industry GB/T10111-1988 Method of random sampling using random numbers GB/T14437-1997 Counting and sampling inspection procedures and sampling plans for product quality supervision GB/T17745-1999 Maintenance and use of casing and tubing in oil and gas industry SY/T5051-1991 Drilling tool cage stabilizer
SY/T 5144—1997 Drill
SY/T5[46—[997 Integral Heavy Drill Pipe
SY520093 Drill Column Conversion Joint
SY/I5987—94 Drill Pipe Overseas Ordering Technical ConditionsSY/T5989—94 Straight Weld Casing Overseas Ordering Technical ConditionsSY/T6128—1995 Oil Casing Threaded Connection Performance Evaluation MethodSY/T 6194—1996 Casing and Tubing
SY/T6417—1999 Performance of Casing, Tubing and Drill Pipe 3 Sampling and Inspection
3.1 Sampling Plan
The sampling plan for oil well pipe product quality evaluation formulated in accordance with GB/T14437 is shown in Table 1. It includes parameters such as sample size, number of unqualified judgments, supervision quality level, inspection level, etc.: 3.2 Product Quality Characteristics and Unqualified Classification
According to the importance of unit product quality characteristics, it is divided into three categories: A, B, and C: 3.2.1 Class A quality characteristics (very important quality characteristics of unit products) a) Class A1: non-destructive testing and weight, water pressure, diameter, etc. (referring to ultrasonic, magnetic powder, X-ray and other flaw detection inspections: weight, diameter, Water pressure, etc.: the length and arc diameter of the thickened transition zone in the drill pipe, the coaxiality of the drill pipe body and the joint after welding, and the wall thickness deviation of the pipe body also belong to this type of quality characteristics):
5) Category A2: Mechanical properties, chemical composition, microstructure (referring to tensile properties, impact properties, flattening properties, hardness and chemical composition, metallographic structure, grain size and other conventional physical and chemical properties); Approved by the State Bureau of Petroleum and Chemical Industry on March 31, 2000, implemented on October 1, 2000
Product name
Oil pipe and casing
Conversion joint and
Drill pipe joint
Drill chain, drilling tool
Stabilizer and integral weighted drill pipe
Sampling plan
Sample Sample size
(pieces)
Number of unqualified judgments
Supervision quality level
Inspection level
Sample size
(pieces)
Number of unqualified judgments
Supervision quality level
Inspection level
Sample size
(pieces)
Number of unqualified judgments
Supervision quality level
Inspection level
Sample size
(pieces)
Number of unqualified judgments
Supervision quality level
Inspection level
SY/T5539-2000
Table 1 Sampling plan for quality evaluation of oil well pipe products Quality characteristics of Class A
Class AI (no
destructive testing and
weight, water pressure
drift diameter, etc.)
Class A2 (mechanical
properties, chemical
composition, microstructure)
Class A3 (basic
physical properties)
Class B quality characteristics
(thread parameters)
(geometric dimensions)
Class C quality characteristics
Class C2 (marking
(appearance quality)
marking, coating,
packaging)
c) Class A3: basic physical properties (referring to the overall connection strength, make-up/break-out performance, and sealing performance of tubing and casing products). 3.2.2 Category B quality characteristics (important quality characteristics of unit products) a) Category BI: thread parameters (referring to thread pitch, single thread parameters, value from pipe end to coupling center after tightening, whether there is black thread within the complete crest thread length of tubing or casing, whether the depth of incomplete thread other than complete crest thread exceeds tolerance, whether the coaxiality of joint thread and joint body meets the requirements, etc.); b) Category B2: geometric dimensions (referring to product outer diameter, straightness, length and other shape dimensions) 3.2.3 Category C quality characteristics (general quality characteristics of unit products) a) Category C1: appearance quality (damage, tearing, burrs, rust spots, slight grooves, etc. on pipe body, shoulder, end face, thread and other parts).
b) (Class 2: marking, coating, packaging (referring to marking, coating, packaging, thread protector, thread grease, etc.). 3.3 Sample extraction
Sample extraction can be carried out by simple random sampling in the whole population using GB/T10111 or other methods, or by stratified proportional random sampling or multi-level sampling methods as appropriate to ensure that the sample has good representativeness. 2
3.4 Sample inspection
SY/T5539--2000
Product quality evaluation and inspection of oil well pipes can be completed by full-time product quality supervision and inspection personnel at the production site, storage and transportation site, use site or full-time inspection agency.
Under normal circumstances, oil pipes and casings should be in accordance with GB/T9253.2. Inspections shall be conducted in accordance with the provisions of SY/T6194, SY/T6128, GB/T17745, SY/T6417, and SY/T5989; drill pipes shall be inspected in accordance with the provisions of SY/T5987; drill stem conversion joints, drill pipe joints, drills, drill tool stabilizers, and integral weighted drill pipes shall be inspected in accordance with the provisions of SY5200, SY/T5987, SY/T5144, SY/T5051, and SY/T5146 respectively.
4 Determine whether the sampling population can be graded. For each inspection item, inspect each sample in the sample one by one according to the inspection method and qualified judgment criteria specified in the corresponding standards. Accumulate the number of unqualified products by quality characteristics. If the number of unqualified products in any category of the sample is greater than or equal to the corresponding unqualified judgment number in Table 1, the population cannot be graded. If the number of non-conforming products in all categories is less than the corresponding non-conforming judgment number, the population is considered to have passed the sampling inspection and can be graded. The evaluation method is shown in Chapter 5 and Chapter 6. Quality evaluation inspection scoring rules
The inspection results of the three quality characteristics of A, B, and C (a total of 7 sub-categories) specified in 3.2 are scored separately (the full score for each category is 100 points). 5.1 Inspection scoring rules for category A1 (non-destructive testing and weight, water pressure, diameter, etc.), category B (thread parameters, geometric dimensions) and category C (appearance quality, marking, coating, packaging) The inspection scoring rules for non-destructive testing and weight, water pressure, diameter, thread parameters, geometric dimensions, appearance quality, marking, coating, packaging, etc. are shown in Table 2.
Table 2 Scoring rules for inspection of quality characteristics of Class AI, Class B and Class C Product name
Sampling plan
Actual sample does not
Number of qualified products, pieces
Score, points
Sampling plan
Actual sample does not
Number of qualified products,
Score, points
Sampling plan
Actual sample does not
Number of qualified products,
Score, points
Sampling plan
Actual sample does not
Number of qualified products, pieces
Score, points
Sampling plan
Actual sample does not
Number of qualified products,
Score, points
Oil pipe and casing
(80, 3)|| tt||(50,4)
(50,5)
(32,5)
(50,2)
(32,3)
(32 , 4)
(20,4)
(13,4)
Conversion joint
and drill pipe joint
(32,2)
( 20, 3)
The first number represents the sample size,
Note: In the sampling plan,
the second number represents the number of unqualified judgments
(20, 4)
(13, 3)
Drill chain, drill stabilizer and integral
weighted drill pipe
(13, 2)
SY/T 5539--2000
5.2A2 (mechanical properties, chemical composition, microstructure) inspection scoring rules Each sample drawn such as tensile properties, impact properties, flattening properties, hardness and chemical composition, metallographic structure, grain size and other conventional physical and chemical properties meet the corresponding standard requirements, then 60 points can be obtained. If any conventional physical and chemical performance index of any sample fails, no points will be awarded for this item. The final score of this item should be calculated based on the lower score of each sample. For every 10% increase in impact toughness relative to the standard value, 4 points can be added to the basic score of 0 points (but a maximum of 40 points can be added). For a drill pipe, if the tensile specimen in the friction butt weld zone breaks at the weld, 5 points will be deducted for each occurrence. The final score of each sample should be calculated based on the lower score of the drill pipe body, drill pipe joint, and friction butt weld zone. For pipes and casings, the final score of each sample should be calculated based on the lower score of the pipe body and coupling. 5.3A3 category (basic physical performance) inspection scoring rules - only applicable to tubing and casing basic physical performance inspection is carried out in accordance with SY/T6128, and its samples should be randomly paired for testing. The overall connection strength test results that meet the requirements of SY/I6417 will be awarded 24 points. If the overall connection strength of any sample does not meet the standard requirements, the basic physical performance item will not be scored. For each 3% (calculated based on the lower value) that exceeds the standard, 4 points will be added (but a maximum of 16 points can be added). The make-up and break-out speed and torque should meet the requirements of GB/T17745. Among them, if the casing is repeatedly buckled 3 times under the maximum torque condition or the tubing is repeatedly buckled and unbuckled 10 times under the maximum torque condition, if no sticking occurs at all, 30 points will be awarded; if a slight sticking occurs in each sample of the same group (the tooth shape is basically complete and can still be used after grinding), 4 points will be deducted; if one sample is seriously sticking, no points will be awarded for the basic physical performance item.
Use! The thread sealing performance test of the tubing and casing of the oil and water injection wells should choose clean water or oil as the medium*, and 18 points will be awarded if no leakage occurs when the standard test pressure of SY/T6194 is reached and 30rin is reached without leakage; if any sample leaks, no points will be awarded for the basic physical performance item: under the standard test pressure specified in SY/T6194, if slight leakage occurs (water drops appear but do not fall off), 6 points will be deducted for each occurrence: if the standard test pressure exceeds the standard test pressure specified in SY/T6194, 3 points will be added for each 10% (calculated according to the lower value) (but a maximum of 12 points can be added). All basic physical performance items are calculated based on the lower score. 6 Comprehensive Evaluation
6.1 Determination of Comprehensive Score
The comprehensive score X of oil well pipe products is the sum of the products of the scores of various quality characteristics and their corresponding weight values. The weight values of various quality characteristics are shown in Table 3:
Table 3 Weight values of various quality characteristics of oil well pipe products Quality characteristics
AI (non-destructive detection and weight, water pressure, diameter, etc.)A2 (mechanical properties, chemical composition, microstructure)A3 (basic physical properties)
B1 (thread parameters)
2 (geometric dimensions)
(1 (appearance quality)
C2 (marking, coating, packaging)
Oil pipe, casing
Weight value
Other oil well pipe products
*Note: The physical performance inspection of oil pipes and sleeves for other "methods" (such as gas recovery, thermal recovery, etc.) is not within the scope of this evaluation. 6.2 Classification of product grades
SY/T 5539—2000
Shantou combined pipe product grades can be divided according to the comprehensive scores obtained in 6.1 according to Table 4. Table 4 Oil well pipe product grade classification
Comprehensive scorewwW.bzxz.Net
1002X90
90>X80
80>X70
6.3 Example of oil well combined pipe product quality evaluation
Product level
A batch of casings from a factory were tested and the scores of A1, A2, A3, B1, B2, CI, and C2 quality characteristics were 80, 88, and 92 respectively. , 70, 70, 90, 100 points, then the comprehensive score is: X = 80 × 0.25 + 88 × 0.18 + 92 × 0.22 + 70 × 0.15 + 70 × 0.10 + 90 × 0.07 + 100 × 0.03 - 82.88 Therefore, the final evaluation result of this batch of casing is Grade II. 7 Processing of quality evaluation results
All oil and gas pipes rated as Grade I, Grade II, and Grade II can be recommended for purchase, among which Grade I oil well pipe products are preferred products, and Grade II well pipe products are not recommended for purchase. Because they failed to pass the sampling inspection, The purchase of oil and pipe products that cannot be graded should be stopped.
Product name
Sampling plan
Number of unqualified samples
Whether it can be graded
Inspection score
Comprehensive score
Product level
Recommended treatment opinions
SY/T5539—200
Appendix A
(Suggested appendix)
Registration form for oil well pipe product quality evaluation inspection results (format) Table A1 Oil well pipe product quality evaluation Price inspection result registration form inspection standard
Class A quality characteristics
Class A1 (non-destructive Class A2 (mechanical tree
flaw detection and weight, energy, chemical composition,
ice pressure, diameter, etc. 》
microstructure)
Class A3 (basic
physical performance)
Class B quality characteristics
(thread parameters)! (geometric dimensions)
Class C quality characteristics
(appearance quality)
(marking, coating,
packaging)88Therefore, the final evaluation result of this batch of casing is Grade II. 7 Handling of quality evaluation results
All oil and gas pipes rated as Grade I, Grade II and Grade II can be recommended for purchase, among which Grade I oil well pipe products are preferred products, and Grade II oil well pipe products are not recommended products. Oil and gas pipe products that cannot be rated due to failure to pass sampling inspection should be stopped from being purchased.
Product name
Sampling plan
Number of unqualified samples
Whether it can be rated
Inspection score
Comprehensive score
Product level
Recommended handling opinions
SY/T5539—200
Appendix A
(Recommended (Appendix as shown)
Registration form for oil well pipe product quality evaluation and inspection results (format) Table A1 Registration form for oil well pipe product quality evaluation and inspection results Inspection standard
Class A quality characteristics
Class A1 (non-destructive Class A2 (mechanical tree
flaw detection and weight, energy, chemical composition,
ice pressure, drift diameter, etc. 》
microstructure)
Class A3 (basic
physical performance)
Class B quality characteristics
(thread parameters)! (geometric dimensions)
Class C quality characteristics
(appearance quality)
(marking, coating,
packaging)
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