API SPEC 7 ADD 3: Specification for Rotary Drill Stem Elements
SDO: API: American Petroleum Institute
DOD Adopted ANSI Approved Approved
This specification covers requirements on drill-stem members (except drill pipe), including threaded connections, gauging practice, and master gauges therefor. A typical drill-stem assembly is shown in Figure 1. Also included, as appendices, are recommended practices on care and use of regional master, reference master, and working gauges.
Where material requirements are not otherwise specified, material for equipment supplied to this specification may vary depending on the application but shall comply with the manufacturer's written specifications. Manufacturer specifications shall define:
a. Chemical composition limits.
b. Heat treatment conditions.
c. Mechanical property limits:
1. Tensile strength.
2. Yield strength.
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