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Delivery: <= 5 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 31033-2025: Technical requirements for well control technology of oil and gas drilling Status: Valid GB/T 31033: Historical versions
Basic dataStandard ID: GB/T 31033-2025 (GB/T31033-2025)Description (Translated English): Technical requirements for well control technology of oil and gas drilling Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: E13 Classification of International Standard: 75.020 Word Count Estimation: 30,314 Date of Issue: 2025-02-28 Date of Implementation: 2025-09-01 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 31033-2025: Technical requirements for well control technology of oil and gas drilling---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.GB/T 31033-2025 English version. Technical requirements for well control technology of oil and gas drilling ICS 75.020 CCSE13 National Standard of the People's Republic of China Replace GB/T 31033-2014 Technical requirements for well control in oil and gas drilling Released on 2025-02-28 2025-09-01 Implementation State Administration for Market Regulation The National Standardization Administration issued Table of ContentsPreface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Well Control Design 1 5 Installation and use of well control equipment 3 6 Preparation and inspection before drilling into oil and gas layers 5 7 Well control operations during oil and gas reservoir drilling 5 8 Fire prevention, explosion prevention and hydrogen sulfide prevention measures 7 9 Handling of uncontrolled blowouts 8 10 Well control responsibility management 8 Appendix A (Informative) Wellhead Assembly Diagram 9 Appendix B (Informative) Casing head structure diagram 16 Appendix C (Informative) Well Control Manifold Assembly and Layout 17 Appendix D (Normative) Well Closure Operation Procedures 21 Reference 23ForewordThis document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. This document replaces GB/T 31033-2014 "Technical Specification for Well Control in Petroleum and Natural Gas Drilling". In addition to structural adjustments and editorial changes, the main technical changes are as follows. a) The scope has been changed (see Chapter 1, Chapter 1 of the.2014 edition); b) The definitions of "sulfur oil and gas wells" and "high-sulfur oil and gas wells" have been changed (see 3.1 and 3.2 of the.2014 edition); c) The supplementary conditions for the safety distance requirements for well locations provided in the geological design have been changed [see 4.1a), 4.1b],.2014 edition 4.1a), 4.1b)], deleted the distance requirement between the shaft and underground mining tunnels and mine passages [see the.2014 edition 4.1c)]; d) Changes to the additional safety value or additional density of drilling fluids for oil and gas layers containing toxic and hazardous gases such as hydrogen sulfide and carbon dioxide. Requirements on the upper limit of pressure (see 4.6, 4.6 of the.2014 edition); e) The well control requirements for wellbore structure design have been changed [see 4.7a), 4.7b), 4.7d), 4.7e), 4.7a), 4.7b), 4.7e of the.2014 edition 4.7d), 4.7e)]; f) Changed the requirements for the storage of weighted drilling fluid, weighted materials and desulfurizer before drilling into oil and gas formations (see 4.9, 4.9 of the.2014 edition); g) Changes to the blowout preventer guide, blowout preventer, spool, casing head, gate valve, choke manifold, kill manifold, blowout preventer line and blowout line Connection requirements (see 4.10, 5.1 of the.2014 edition); h) Changed the relevant requirements for well control equipment (see 4.11a), 4.11c), 4.11d), 4.11f), 4.11i),.2014 edition 4.10a), 4.10c), 4.10d), 4.10f), 4.10i)]; i) Deleted the provisions on the technical requirements for well control devices (see 5.1 of the.2014 edition); j) Changed the requirements for the locking device of the gate blowout preventer [see 5.1b), 5.2b) of the.2014 edition]; k) Changed the installation and use requirements of the remote control console for BOP (see 5.2a), 5.2b), 5.2c), 5.2d), 5.2e), 5.2g), 5.2h), 5.3a), 5.3b), 5.3c), 5.3d), 5.3e), 5.3g), 5.3h) of the.2014 edition]; l) Changed the installation requirements for the driller's console [see 5.3, 5.4 of the.2014 edition]; m) The operating procedures for using shear gate blowout preventers to shear off drilling tools in the well have been changed, and the ultra-high pressure shear well shut-in procedure has been added [see 5.5, 5.6 of the.2014 edition]; n) Changed the installation and use requirements of casing heads [see 5.6a), 5.6b), 5.7a), 5.7b) of the.2014 edition]; o) The installation and use requirements of blowout preventer pipelines have been changed [see 5.8b), 5.9b) of the.2014 edition]; p) Deleted the installation and use requirements of the pressure gauge on the blowout preventer line [see 5.11 of the.2014 edition]; q) The installation and use requirements of the blowdown line have been changed [see 5.11e), 5.11f), 5.11g), 5.12e), 5.12f) of the.2014 edition 5.12g)]; r) Changed the installation and use requirements of internal blowout prevention tools [see 5.12a), 5.12b), 5.12c), 5.13a), 5.13b),.2014 edition 5.13c)]; s) Changed the installation and use requirements of liquid-gas separators [see 5.13c), 5.14c of the.2014 edition)]; t) Changed the installation requirements for the exhaust pipeline of the vacuum degasser (see 5.14, 5.15 of the.2014 edition); u) Changed the pressure test requirements for well control equipment [see 5.15a), 5.15b), 5.15d), 5.15e), 5.16a), 5.16b),.2014 edition 5.16d), 5.16e)]; v) Changed the time requirements for blowout prevention drills for work teams (see 6.4, 6.4 of the.2014 edition); w) Added the requirement that the construction unit should appoint supervisors to stay at the well or inspect the well during the drilling of oil and gas formations (see 7.1); x) Changed the requirements for monitoring formation pressure at the bottom of exploration wells, pilot wells and data wells (see 7.3, 7.2 of the.2014 edition); y) Changed the requirements for testing the circulating pressure of each new drill bit before starting drilling (see 7.5, 7.4 of the.2014 edition); z) The technical measures to prevent overflow and blowout during drilling and drilling have been modified (see 7.8, 7.7 of the.2014 edition); aa) The measures for lost circulation during drilling have been modified (see 7.12, 7.11 of the.2014 edition); bb) Changed the well control requirements for logging and cementing [see 7.13, 7.15, 7.12, 7.14 of the.2014 edition]; cc) The parameters to be verified after well shut-in have been changed (see 7.18, 7.17 of the.2014 edition); dd) Deleted the description of the well killing method after the empty well overflows and shuts in (see 7.19 of the.2014 edition); ee) Modified some contents of measures for preventing hydrogen sulfide in sour oil and gas wells (see 8.2.2, 8.2.3, 8.2.7, 8.2.10, 8.2.2, 8.2.3, 8.2.7, 8.2.10 of the.2014 edition) 8.2.3, 8.2.7, 8.2.10); ff) Modified some contents in the treatment of uncontrolled blowout (see 9.2, 9.7, 9.2, 9.7 of the.2014 edition); gg) Deleted well control and hydrogen sulfide protection training (see Chapter 10 of the.2014 edition); hh) Added well control technology management (see Chapter 10); i) Added 140MPa BOP combination (see A.2.3 in Appendix A) j) Added 140MPa throttle manifold combination (see C.1.3 in Appendix C); kk) The numbering of the internal control gate valve in the well control manifold layout of the double drilling four-way wellhead has been changed (see C.3.2, C.3.2 of the.2014 edition). Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document was proposed and coordinated by the National Petroleum and Natural Gas Standardization Technical Committee (SAC/TC355). This document was drafted by. China National Petroleum Corporation Sichuan Qinghai Drilling Engineering Co., Ltd., China National Petroleum Corporation Bohai Drilling Engineering Co., Ltd., China National Petroleum Corporation Oilfield Technology Service Co., Ltd., Sinopec Shengli Petroleum Engineering Co., Ltd., China National Petroleum Corporation Jidong Oilfield Branch, Beijing Petroleum Machinery Co., Ltd., CNOOC (China) Co., Ltd., and CNOOC Energy Technology & Development Co., Ltd. The main drafters of this document are. Wu Xianzhu, Tan Bin, Tang Xiaoming, Yan Ling, Zhang Songjie, Fu Qiang, Li Dehong, Ye Linxiang, Luo Yuan, Wang Yong, Yuan Xiaobing, Pang Ping, Hu Xuguang, Peng Li, Xu Yongjun, Wu Huisheng, Yang Bo, Ren Xiaobin, Yao Xianrong, Yan Yan, Dong Liming, Yang Houtian, Zhu Kuanliang, Guo Chen, Xu Hongtu, Luo Weihua, Wang Maolin, Zhu Renfa, Liu Guiyi, Qiao Huotong, Xia Qiang, Li Bin, Hu Guanghui, Li Hongbing, Wang Chao, Qing Yu, Miao Dianyuan, Wang Qing, Wang Liuyang, Thanks to Yixiang and Fan Jun. This document was first published in.2014 and this is the first revision. Technical requirements for well control in oil and gas drilling1 ScopeThis document specifies the technical requirements for well control in oil and gas drilling operations. This document is applicable to oil and gas well pressure control in oil and gas exploration and development drilling operations on land, offshore and artificial islands. Gas well control technology management shall be implemented by reference.2 Normative referencesThe contents of the following documents constitute essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. GB/T 20174 Petroleum and natural gas drilling equipment Drilling equipment GB/T 20972 (all parts) Materials for use in hydrogen sulfide environments in oil and gas production in the petroleum and natural gas industry GB/T 22513 Wellhead equipment and Christmas trees for drilling and production equipment in the petroleum and natural gas industry3 Terms and definitionsThe following terms and definitions apply to this document. 3.1 sulfurous oil and gas well Wells with hydrogen sulfide content in formation natural gas greater than 75 mg/m3 (50 ppm). 3.2 High sulfur oil and gas well Wells with hydrogen sulfide content of formation natural gas not less than 30,000 mg/m3 (20,000 ppm). 3.3 High-pressure oil and gas well Wells with formation pressure not less than 70MPa.4 Well Control Design4.1 The well locations provided in the geological design should meet the following safety distance requirements. a) The distance between the wellhead and high-voltage wires and other permanent facilities shall be no less than 75m; the distance from residential buildings shall be no less than 100m; the distance from underground mineral mining shall be no less than 100m; The distance from tunnels and mine passages should be no less than 100m; the distance from railways and highways should be no less than.200m; the distance from schools, hospitals, oil depots, and densely populated areas... And high-risk places should not be less than 500m. b) The distance between the wellheads of oil and gas wells is not less than 2m; the hydrogen sulfide content in the formation natural gas is equal to or greater than 1000ppm (1500mg/m3) well, the distance between its wellhead and other wellheads is greater than the length of the drilling platform of the drilling rig used to drill the well, and Not less than 8m. 4.2 The geological design should indicate the residential buildings, schools, factories, mines, national defense facilities, drinking water resources and other resources within a certain range around the well site. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 31033-2025_English be delivered?Answer: Upon your order, we will start to translate GB/T 31033-2025_English as soon as possible, and keep you informed of the progress. The lead time is typically 3 ~ 5 working days. 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Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.Question 5: Should I purchase the latest version GB/T 31033-2025?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 31033-2025 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. |
