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NB/T 11527-2024Code of practice for pneumatic directional drilling in underground coal mine (English PDF)

煤矿井下气动定向钻进技术规程

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Issued by

NEA

Level / Type

Industry · Recommended

Issue date

May 24, 2024

Implementation date

November 24, 2024

Scope

NB/T 11527-2024 is the English-translated version of 煤矿井下气动定向钻进技术规程.

NB/T 11527-2024 is the Chinese energy industry code of practice for pneumatic directional drilling underground in coal mines, where compressed gas serves as the circulating power medium while measurements are taken during drilling.

It deals with the formation conditions that suit the method, selection of drilling equipment such as air compressors, nitrogen generators, dust collectors and screw drilling tools, drilling design, site requirements, drilling and hole completion techniques, and safety measures during construction.

It builds on NB/T 10173-2019. Air directional drilling, with compressed air as the medium, is treated as one form of the method. Issued on 24 May 2024, it has applied since 24 November 2024.

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Document preview — NB/T 11527-2024

National Standard of the People's Republic of China

ICS: 73.020
Classification: D 80

Issued by: National Energy Administration of the People's Republic of China

Preface
1 Scope
2 Normative references
3 Terms and Definitions
4 Applicable formation conditions
5 Drilling equipment selection
6 Drilling Design
7 Site Requirements
8 Drilling and hole finishing technology
9 Construction safety technical measures

Foreword

This 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.

1 Scope

This document specifies the applicable formation conditions, drilling equipment selection, drilling design, site requirements, drilling Requirements on drilling and completion techniques, construction safety technical measures, etc.

This document is applicable to directional drilling operations using gas-based fluid as the circulating power medium during measurement while drilling in coal mines.

2 Normative references

The contents of the following documents constitute the 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 3836.1 Explosive atmospheres Part 1: General requirements for equipment

GB/T 3836.2 Explosive atmospheres Part 2: Equipment protected by flameproof enclosure "d"

GB/T 3836.4 Explosive atmospheres Part 4: Equipment protected by intrinsic safety type "i" AQ1013 Safety inspection and testing specifications for air compressors in use in coal mines

AQ1027-2006 Coal Mine Gas Extraction Specification

MT/T 159 General technical requirements for mining dust collectors

MT/T 521 Conventional drill rods for coal mine tunnel drilling

MT/T 687 Air compressor for underground coal mines

MT/T 774 General technical requirements for mobile membrane separation nitrogen production equipment for coal mines

MT/T 790 Coal Mine Tunnel Exploration Drilling Rig

MT/T 1135 General technical requirements for carbon molecular sieve nitrogen generators for coal mines

NB/T 10173-2019 Technical specification for directional drilling in underground coal mines

NB/T 10174 Technical requirements for directional drilling while drilling measurement equipment for mining

NB/T 10175 Coal mine underground wired measurement while drilling drill pipe

SY/T 5383 Screw Drilling Tools

SY/T 5547 Use, maintenance and management of screw drilling tools

3 Terms and definitions

The terms and definitions defined in NB/T 10173-2019 and the following apply to this document.

3.1 Pneumatic directional drilling

Directional drilling method and process for measurement while drilling using gas-based fluid (compressed gas as the main body) as circulating power medium in coal mines.

3.2 Air directional drilling

Pneumatic directional drilling using compressed air as the circulating power medium.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

AQ1027-2006 · MT/T 159 · MT/T 687 · SY/T 5547

Similar standards

GB/T 24505-2009|NB/T 11543-2024|NB/T 11646-2024|NB/T 11121-2023|NB/T 11528-2024|NB/T 11639-2024

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