GB/T 29166-2021 Petroleum and natural gas industries—Steel drill pipe

Scope

This document specifies the technical requirements for the supply of steel drill rods used in drilling and production operations in the oil and gas industry, with end-thickened tubes and welded drill rod joints. In this document, steel drill rods are divided into three product specification grades (PSL-1, PSL-2, and PSL-3). The requirements for PSL-1 are the basic requirements of this document. Appendix A specifies the standard technical requirements for different grades of PSL-2 and PSL-3.
This document includes the following drill rod steel grades:
——E steel grade drill rods;
——High-strength grade drill rods: X, G, S, V, and U steel grades;
——Hydrogen sulfide resistant enhanced drill rods: D and F steel grades (also known as SS steel grades).
Figure E.1 shows a typical drill rod structure and marks the main components and lengths. The main dimensions and weights of each steel grade drill rod are given in both the International System of Units (see Table C.1) and the U.S. customary system (see Table D.1).
This document also applies to drill rods with drill rod joints that are not specified in national standards or ISO standards.
Upon agreement between the purchaser and the manufacturer, this document also applies to drill rod tubes and/or drill rod joints of other sizes. This document specifies additional requirements for testing, performance verification, and non-destructive testing (Appendix B), which are selected by the purchaser and the manufacturer in consultation.
This document does not consider the performance in use.
Note 1: In this document, drill rods are named by code 1, code 2, the steel grade of the material (E, X, G, S, V, U, D, and F), the thickening type, and the rotating shoulder connection type. These names are used for identification when ordering.
Note 2: Detailed requirements for the thread processing of drill rod joints are specified in GB/T 22512.2.
Note 3: The performance in u

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