API SPEC 7-1
Specification for Rotary Drill Stem Elements
|Publication Date:||1 March 2006|
This standard specifies requirements for the following drill stem elements: upper and lower kelly valves; square and hexagonal kellys; drill stem subs; standard steel and non-magnetic drill collars; drilling and coring bits.
This standard is not applicable to drill pipe and tool joints, rotary shouldered connection designs, thread gauging practice, or grand master, reference master and working gauges.
A typical drill stem assembly to which this standard is applicable is shown in Figure 1.
Application of the API Monogram
If the product is manufactured at a facility licensed by API and is intended to be supplied bearing the API Monogram, the requirements of Annex B apply.