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GB/T 23512-2025: Petroleum and natural gas industries - Evaluation and testing of thread compounds for use with casing, tubing, line pipe and drill stem elements
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GB/T 23512-2025	English	1159	Add to Cart	8 days [Need to translate]	Petroleum and natural gas industries - Evaluation and testing of thread compounds for use with casing, tubing, line pipe and drill stem elements
GB/T 23512-2015	English	854	Add to Cart	5 days [Need to translate]	Petroleum and natural gas industries -- Evaluation and testing of thread compounds for use with casing, tubing, line pipe and drill stem elements
GB/T 23512-2009	English	RFQ	ASK	4 days [Need to translate]	Petroleum and natural gas industries -- Evaluation and testing of thread compounds for use with casing, tubing and line pipe

GB/T 23512-2025: Petroleum and natural gas industries - Evaluation and testing of thread compounds for use with casing, tubing, line pipe and drill stem elements

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ICS 75.180.10 CCSE92 National Standards of the People's Republic of China Replaces GB/T 23512-2015 Oil and gas industry casing, tubing, and line pipe Evaluation and testing of thread grease for drill string components (ISO 13678.2010, MOD) Published on 2025-10-05 Implemented on May 1, 2026 State Administration for Market Regulation The State Administration for Standardization issued a statement.

Table of contents

Preface III 1.Scope 1 2 Normative References 1 3.Terms and Definitions 1 4.Thread grease performance 2 4.1 Product Performance 2 4.2 Physical and chemical properties of threadlocker grease for casing, tubing, and line pipe 3 5.Performance of threadlocker grease 5.1 Friction Properties 5 5.2 Anti-hooking performance 6 5.3 Fluid sealing performance 6 6.Quality Assurance and Control 7. 7.Marking Requirements 7.1 Mark 7 7.2 Tag 7 Appendix A (Informative) API Improved Thread Grease 8 A.1 Overview 8 A.2 Threadlock Grease 8 A.3 Solid Component Composition 8 A.4 Base Lipid 8 A.5 Performance Tests and Requirements 8 A.6 Component Material Requirements 9 Appendix B (Informative) API Modified Standard Grease Formulations for Casing, Tubing and Line Pipes 11 Appendix C (Normative) Cone Penetration Test 13 C.1 Overview 13 C.2 Equipment 13 C.3 Step 13 Appendix D (Normative) Evaporation Test 14 D.1 Overview 14 D.2 Equipment 14 D.3 Step 14 Appendix E (Normative) Density Test 15 E.1 Overview 15 E.2 Equipment 15 E.3 Step 15 Appendix F (Normative) Coating and Adhesion Tests 16 F.1 Overview 16 F.2 Equipment 16 F.3 Step 16 Appendix G (Normative) Escape Volume Test 17 G.1 Overview 17 G.2 Equipment 17 G.3 Step 18 G.4 Sample Test Data 19 G.5 Calculation 19 Appendix H (Normative) Water filtration test 20 H.1 Overview 20 H.2 Equipment 20 H.3 Step 22 Appendix I (Normative) Test for Friction Performance of Thread Grease 24 I.1 Overview 24 I.2 Equipment 24 I.3 Step 25 I.4 Data Processing 31 I.5 Application of Friction Coefficient 33 Appendix J (Normative) Test for Ultimate Surface Contact Pressure (Hook & Loop) Performance 34 J.1 Overview 34 J.2 Equipment 34 J.3 Step 34 Appendix K (Informative) Fluid sealing test of threadlock grease for casing, tubing and line pipe 40 K.1 Overview 40 K.2 Full-size test method 40 K.3 Step-type leakage resistance test procedure and typical test results 41 Appendix L (Informative) Corrosion Resistance Test 48 L.1 Overview 48 L.2 Full-scale test procedures for casing, tubing, and drill string components 48 L.3 Corrosion Test of Specimens---GB/T 10125 Salt Spray Specimen Test 49 L.4 50 Alternative Test Methods Appendix M (Informative) High-Temperature Stability Test of Thread Grease 51 M.1 Overview 51 M.2 Equipment 51 M.3 Step 51 References 52

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents". Drafting. This document supersedes GB/T 23512-2015 "Evaluation of Thread Grease for Casing, Tubing, Line Pipeline and Drill String Components in the Petroleum and Natural Gas Industry". Compared with GB/T 23512-2015, the main technical changes in "Pricing and Testing" are as follows, apart from structural adjustments and editorial modifications. a) The phrase "not applicable to other formulations of threadlocker grease" has been removed (see Chapter 1 of the.2015 edition); (b) The terms "API modified standard grease formulation" and "connection system with threadlocker grease" have been changed (see 3.2, 3.8, and 4.9 of the.2015 edition). 4.15); c) The term "friction coefficient" has been added (see 3.3); d) Some terms, such as "API connection," have been removed (see sections 4.1, 4.3-4.8, 4.10, and 4.16 of the.2015 edition); e) The physical and chemical properties testing for threadlocker grease has been modified (see Tables 1 and 2, Table 1 in the.2015 edition); f) Increased corrosion resistance of the storage grease (see Table 2); g) The small-size test has been removed (see 6.1 in the.2015 edition); h) The tribological test has been modified (see 5.1, 6.2 in the.2015 edition); i) The anti-hooking performance test has been modified (see 5.2, 6.3 in the.2015 version); j) The oil separation test has been removed (see Appendix E of the.2015 edition); k) An additional density test method has been added (see Appendix E). This document modifies and adopts ISO 13678.2010 "Evaluation of threadlocker grease for casing, tubing, line pipe and drill string components in the oil and gas industry". Price and Test. Compared with ISO 13678.2010, this document has undergone the following structural adjustments. ---Chapter 2 of ISO 13678.2010 has been deleted; Chapters 2 and 3 correspond to Chapters 3 and 4 of ISO 13678.2010. ---Chapter 4 corresponds to Chapter 5 of ISO 13678.2010, where 4.2.3 corresponds to 5.2.6, 4.2.4 corresponds to 5.2.3, and 4.2.6 corresponds to... 5.2.7 and 4.2.7 correspond to 5.2.9, 4.2.8 corresponds to 5.2.4, and 4.2.9 corresponds to 5.2.8; ---Chapter 5 corresponds to Chapter 6 of ISO 13678.2010, where 5.1 corresponds to 6.2, 5.2 corresponds to 6.3, and 5.3 corresponds to 6.4. The technical differences between this document and ISO 13678.2010, and the reasons therefor, are as follows. ---The consistency requirement has been removed (see Chapter 2), and data uses a unified International System of Units (SI), so no further specification is needed; ---The terms and definitions of "API modified standard grease formulation" (see 3.2) and "connection system with threadlocker grease" (see 3.8) have been changed in order to... Easy to understand; ---The term "friction coefficient" (see 3.3) has been added to ensure the consistency and accuracy of the friction coefficient test results for thread grease; ---The following terms have been removed. "API connection", "internal threaded connector", "casing, tubing and line pipe", "drill string components", "external threaded connector", and "special threaded connector". "Connection", "Proprietary Connection", "Reference Standard Formulation (Thread Grease for Rotary Shoulder Connections)", "Tool Fittings" (see ISO 13678.2010) Terms and definitions in sections 4.1, 4.3, 4.4–4.8, 4.10, and 4.16 are general terms; ---The normative reference GB/T 3498 (see 4.2.1) has been added to facilitate the determination of dropping points over a wide temperature range; ---The normative references GB/T 10125 and NB/SH/T 0324 (see 4.2.1) have been added to facilitate salt spray testing and classification. Oil quantity test; ---ISO 2137, ISO 2176, and ASTM have been replaced with the normatively referenced GB/T 269, GB/T 4929, and GB/T 7326. D4048 (see Appendix C) is designed to adapt to my country's technical conditions and increase operability; ---The size requirements for the evaporating dish have been increased (see D.2) to facilitate evaporation capacity testing; ---The test method for oil separation (see Annex E of ISO 13678.2010) has been deleted to facilitate the implementation of this document; ---A density test method has been added (see Appendix E) to facilitate threadlocker grease density testing; ---Added requirements for balances (see F.2) to facilitate mass weighing; ---The test method for the friction performance of thread grease has been modified (see Appendix I) to facilitate the testing of thread grease friction performance; ---The test method for thread grease anti-sticking performance has been modified (see Appendix J) to facilitate the testing of thread grease anti-sticking performance. The following editorial changes have been made to this document. ---The environmental protection instructions for thread grease in the scope have been changed to note; ---4.1 Product performance has been improved by adding "grease stability" and "evaporation rate"; ---Note added in version 4.2.5; ---Footnote a in Table A.3 has been deleted. Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents. This document was proposed and is under the jurisdiction of the National Technical Committee on Standardization of Petroleum and Natural Gas (SAC/TC355). This document was drafted by. China Petroleum Engineering Materials Research Institute Co., Ltd., Xi'an Sanhuan Petroleum Pipe Technology Co., Ltd., and China... Safety, Environmental Protection and Technical Supervision Research Institute of Southwest Oil and Gas Field Branch of PetroChina Company Limited, and Wuxi PetroChina Lubricating Grease Co., Ltd. The company, Qingdao Top Petrochemical Co., Ltd., Tianjin Steel Pipe Manufacturing Co., Ltd., Baoshan Iron & Steel Co., Ltd., and Hengyang Valin Steel Pipe Co., Ltd. The company is Shandong Tianhou Petroleum Technology Co., Ltd. The main drafters of this document are. Liu Yangqin, Li Xiaolong, Tian Feng, Xu Ting, Shen Zhaoxi, Yang Su, Shen Jun, Chu Mingming, Tang Changhua, Li Guangfeng, and Shi Bin. Sun Jianan, Wu Dan, Zhang Junwei. This document was first published in.2009, revised for the first time in.2015, and this is the second revision. Oil and gas industry casing, tubing, and line pipe Evaluation and testing of thread grease for drill string components

1 Scope

This document specifies the requirements, inspection, and test methods for threadlocker grease used in casing, tubing, line pipe, and drill string components. This document is applicable to the evaluation of the physicochemical and performance properties of grease-based threadlockers under laboratory conditions. Note. Many regions have environmental protection requirements for this type of product, but this document does not cover compliance with those requirements. The end user is responsible for investigating these requirements. Requires and accordingly makes decisions regarding the selection, use, and disposal of threadlocker grease and related waste.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included. For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies. This document. GB/T 269 Determination of cone penetration of lubricating greases and petroleum greases (GB/T 269-2023, ISO 2137.2020, MOD) GB/T 3498 Determination of dropping point of grease over a wide temperature range (GB/T 3498-2008, ISO 6299.1998, MOD) GB/T 4929 Determination of dropping point of lubricating grease (GB/T 4929-1985, ISO 2176.1979, eqv) GB/T 6003.1 Technical requirements and inspection of test sieves - Part 1.Metal Wire Braided Mesh Test Sieves (GB/T 6003.1- 2022, ISO 3310-1.2016, MOD) GB/T 7326 Corrosion test of copper strips in grease (GB/T 7326-1987, ASTM D4048.1981, eqv) GB/T 10125 Artificial Atmosphere Corrosion Test - Salt Spray Test (GB/T 10125-2021, ISO 9227.2017, MOD) NB/SH/T 0324 Determination of oil separation in lubricating grease using the cone mesh method

3 Terms and Definitions

The following terms and definitions apply to this document. 3.1 Thread grease that meets the composition and performance requirements of Appendix A. 3.2 Prepare a casing, tubing, and line threaded tubing according to the requirements of Appendix B, satisfying the components and requirements in Tables B.1, B.2, and B.3. Surface coating. Note. API modified standard grease formulations are not intended for field service. 3.3 Friction factor; FF Due to the difference in frictional properties between the thread grease used and the standard thread grease, a multiplier is used to correct the thread torque (MUT) multiplier on the connection. ...