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GB/T 46212-2025: Petroleum drilling and production equipment - Electromagnetic telemetry measurement while drilling
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GB/T 46212-2025: Petroleum drilling and production equipment - Electromagnetic telemetry measurement while drilling

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ICS 75.180.10 CCSE92 National Standards of the People's Republic of China Electromagnetic wave transmission while drilling for oil and gas drilling equipment Measurement system Published on 2025-08-29 Implemented on 2026-03-01 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.Composition and Model Designation Method 2 5.Technical Requirements 2 6.Test Methods 7 Inspection Rules 8 8.Signage and accompanying documents 9. 9.Packaging, transportation, and storage 10. Appendix A (Informative) Schematic diagram of electromagnetic wave transmission measurement-while-drilling system 11

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. 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 Drilling Equipment and Tools (SAC/TC96). This document was drafted by. China Petroleum Engineering Technology Research Institute Co., Ltd., Beijing Petroleum Machinery Co., Ltd., and China Petroleum Group. Great Wall Drilling Engineering Co., Ltd., China National Petroleum Corporation Oilfield Technical Services Co., Ltd., and China Petroleum & Chemical Corporation Petroleum Engineering Technology Co., Ltd. Technology Research Institute, Beijing Shigong Intelligent Control Technology Co., Ltd., Dezhou Continental Shelf Petroleum Engineering Technology Co., Ltd., Hangzhou Fenghe Petroleum Technology Co., Ltd. Limited Company. The main drafters of this document are. Yu Dezhou, Gao Wenkai, Wang Jiajin, Luo Kai, Li Xianyi, Chen Xiaohui, Qin Jinli, Wang Lei, Teng Xinmiao, and Peng Liexin. Fan Chunying, Pan Xingming, Sun Chengqin, Zhao Cong, Qiao Jianguo, Lu Liqiang, Song Zhaohui, Cao Chong, Chen Wenyi, Wei Zhigang, Fan Jinhui, Xu Lin, Dong Zhiwei Wang Hongli, Wang Guangshuai, Qian Deru, Sun Qi, Hu Yongjian, Zhang Lei. Electromagnetic wave transmission while drilling for oil and gas drilling equipment Measurement system 1.Scope This document specifies the composition, model designation method, technical requirements, inspection rules, marking, and accompanying equipment of electromagnetic wave transmission measurement-while-drilling systems. The document outlines the packaging, transportation, and storage procedures, and describes the corresponding testing methods. This document applies to the design, manufacture, and inspection of electromagnetic wave transmission measurement-while-drilling systems.

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 223.3 Chemical Analysis Methods for Iron and Steel Alloys II. Determination of Phosphorus Content by Antipyrine-Methane Phosphomolybdic Acid Gravimetric Method GB/T 223.72 Determination of sulfur content in iron and steel and their alloys by gravimetric method GB/T 228.1 Metallic materials – Tensile testing – Part 1.Test method at room temperature GB/T 229 Metallic materials Charpy impact test method GB/T 231.1 Metallic materials – Brinell hardness test – Part 1.Test method GB/T 3452.5 O-rings for hydraulic and pneumatic applications – Part 5.Specifications for elastomer materials GB/T 3836.1 Explosive Atmospheres – Part 1.General Requirements for Equipment GB/T 3836.2 Explosive atmospheres – Part 2.Equipment protected by flameproof enclosures “d” GB/T 4336 Determination of Multi-Element Content in Carbon Steel and Medium-Low Alloy Steel by Spark Discharge Atomic Emission Spectrometry (Conventional Method) GB/T 6463 Review of methods for measuring the thickness of metallic and other inorganic coatings GB 8897.4 Primary Batteries - Part 4.Safety Requirements for Lithium Batteries GB/T 22512.2 Rotary Drilling Equipment for the Oil and Gas Industry - Part 2.Machining and Measurement of Rotary Shoulder Threaded Connections GB/T 35690 Method for measuring the relative permeability of weakly magnetic materials NB/T 47013.3-2023 Non-destructive testing of pressure equipment - Part 3.Ultrasonic inspection NB/T 47013.4-2015 Non-destructive testing of pressure equipment - Part 4.Magnetic particle testing NB/T 47013.5-2015 Non-destructive testing of pressure equipment - Part 5.Penetrant testing SY/T 5102 Basic Environmental Testing Methods for Petroleum Exploration and Development Instruments SY/T 5144 Drill collar SY/T 6702-2019 Technical Conditions for Formation Evaluation Logging While Drilling System 3.Terms and Definitions The following terms and definitions apply to this document. 3.1 During drilling, electromagnetic waves are used as signal carriers, and the formation and drill string are used as transmission mediums to transmit real-time acquired and processed data to the surface. The system. 3.2 Surface antenna A device used to receive electromagnetic wave signals emitted by downhole equipment and convert them into electrical signals. 3.3 An instrument that processes electromagnetic wave signals received from downholes by a ground antenna and acquires downhole data. 3.4 Insulation short section gapsub It has high resistance characteristics and is a special drill collar used to connect the upper and lower drill strings to form a downhole antenna. 3.5 The component that modulates downhole measurement data into electromagnetic wave signals and outputs them to the downhole antenna. 3.6 A component for real-time measurement of well inclination angle, azimuth angle, and tool face angle parameters. 3.7 Components that provide power to downhole equipment. Note. Includes battery packs and/or power generation units. 4.Composition and Model Designation Method 4.1 Composition The electromagnetic wave transmission measurement-while-drilling system consists of a surface unit and a downhole unit. The surface unit comprises a surface antenna, a surface receiver, and a driller's display. The system consists of an indicator, a computer, and related software; a schematic diagram is shown in Figure A.1 of Appendix A. The downhole device comprises an insulating short section, an electromagnetic wave transmitting unit, and a directional... The system consists of a measurement unit and an underground power supply unit, as shown in Figure A.2. 4.2 Model Designation Method The model designation method for electromagnetic wave transmission measurement-while-drilling systems is as follows. EM-MWD □-□-□ Electromagnetic wave transmission measurement while drilling system name code The outer diameter of downhole equipment, in millimeters (mm). Downhole instruments temperature resistance, unit is degrees Celsius (°C). 125, 150, 175 Downhole instrument pressure resistance, unit is megapascal (MPa). 70, 105, 140 Example. EM-MWD121-125-70 indicates an electromagnetic wave transmission measurement while drilling system with an outer diameter of 121mm, a temperature resistance of 125℃, and a pressure resistance of 70MPa. 5 Technical Requirements 5.1 System Performance 5.1.1 Orientation Measurement Unit The technical specifications of the orientation measurement unit should meet the requirements of Table 1. ...