GB/T 24956-2010Recommended practice for petroleum and natural gas industries -- Drill stem design and operating limits (English PDF)

Foreword

This standard is equivalent to using APIRP7G.1998 16th edition RecommendedPracticeforDrilStemDesignand OperatingLimits (1998 entered into force on 12 Yue 1, May 2000 Errata) "drill string design and operating limits recommended practice," including its Amendment 1.2003.

This standard is equivalent translation APIRP7G.1998 16th edition.

To facilitate the practical use of this standard, the following editorial changes made.

The term --- the "Recommended Practice" to "this standard";

--- Remove Special Notice, API 16.8 Introduction and Overview of other information elements;

--- Maps, tables are arranged in accordance with the provisions of GB/T 1.1-2000 of;

--- International standard formula to explain the symbol "=" according to national standard GB/T 1.1 requirement to "---";

--- Technical corrections and amendments incorporated into the body of international standards in the text of the margin by a vertical wire (||) were Identification;

--- According to GB/T 20000.2 requirements, an increase in the Appendix B Appendix NA reference standard to adopt standard conditions; increased appendix NB Imperial units and conversion of legal units of measurement.

Appendix A of this standard is a normative appendix, Appendix B, NA, NB appendix informative.

The standard proposed by China National Petroleum Corporation.

This standard by the National Standardization Technical Committee of Oil and Gas.

This standard was drafted. Drilling Technology Research Institute of Xinjiang Petroleum Administration Bureau.

1 Scope

2 References

(Other references see Appendix B).

APIRP5C1 casing, tubing and use the recommended maintenance practices Formulas and Calculations APIBul5C3 casing, tubing, drill pipe and line pipe properties APISpec7 rotary drilling the drill string assembly specifications APIRP7A1 rotary shouldered connection thread grease Recommended practice test APIRP13B-1 water-based drilling fluids standard field test procedures recommended practice APIRP13B-2 oil-based drilling fluids standard field test procedures recommended practice ASTM1) D3370 standard practice of water samples NACE2) MR0175 oilfield equipment with anti-sulfide stress cracking metal material Above standard country to adopt international standards. See Appendix NA.

1) American Society for Testing Materials (address. 100BarrHarborDrive, WestConshocken, Pennsylvania19428)

2) the National Association of corrosion engineers (POBox218340, Houston, Texas77218-8340)

3 Terms and Definitions

The following terms and definitions apply to this standard.

Flexural strength than bendingstrengthratio Rotary shoulder inside, with the outer thread tightened, male fittings flexural modulus of section at the top of the last threaded engagement with the external threads of the outer joint Bending section modulus ratio within the threaded joint.

Chamfer diameter beveldiameter Rotary shouldered connection outer diameter of the contact surface.

Drill short section bitsub Usually it ends internal thread for connecting the drill bit and drill string joints.