文档介绍：Addendum 1
March 2007
Effective Date: September 1, 2007
Specification for Rotary Drill Stem
Elements
ANSI/API SPECIFICATION 7-1
FIRST EDITION, MARCH 2006
EFFECTIVE DATE: SEPTEMBER 2006
ISO 10424-1:2004 (Modified), Petroleum and natural gas
industries—Rotary drilling equipment—Part 1: Rotary
drill stem elements
Addendum 1 to Specification for Rotary Drill Stem Elements
Add the following new Clause 10. Renumber the current Clause 10 Nondestructive
examination of bars and tubes and sub clauses as Clause 11.
10 Heavy Weight Drill Pipe (HWDP)
General
This standard covers the manufacturing specifications of heavy weight drill pipe that is most commonly
utilized in bottom-hole assemblies. This product should not be confused with heavy wall (or heavy weight)
drill pipe manufactured to meet API Spec 5D. It should be understood that the materials specified herein
are generally not regarded as suitable for sour service or other highly corrosive drilling conditions, and the
User is advised to take this into account when initiating purchase agreements for heavy weight drill pipe if
such drilling conditions are anticipated.
Sizes
Heavy Weight Drill Pipe (HWDP) shall be furnished in the sizes and dimensions shown in Table 27 and as
illustrated in Figure 11.