Tool Joint is a heavy coupling element for drill pipe. The pin section of the joint is attached by friction welding to one end of a length of drill pipe, and the female section, or box, is attached to the other end. Tool joints are usually made of special alloy steel that has been heat treated to a higher strength than the steel of the tube body. The large-diameter section of the tool joints provides a low stress area where pipe tongs are used to grip the pipe. Hence, relatively small cuts caused by the pipe tongs do not significantly impair the strength or life of the joint of drill pipe.
The tool joints, when threaded, provide high-strength, high-pressure connections that are sufficiently robust to survive the rigors of drilling and numerous cycles of tightening and loosening at threads.
A hard-metal facing is often applied in a band around the outside of the tool joint to enable it to resist abrasion from the walls of the borehole. ALTIFORT SMFI has its own manufacturing capabilities for tool joints which are produced according to standard and customers requirements.
All tool joints are 100%:
The size of the tool joint depends on the size of the drill pipe but various sizes of tool joint are available.
Connections can be supplied with different OD and ID combinations:
NC26 (2 3/8" IF
NC38 (3 ½" IF)
NC40 (4" FH)
NC50 (4 ½" IF)
5 ½" FH
6 5/8" FH
Typical steel grade 38CD4, P26 family from 110 Ksi to 130 Ksi yield strength. Other grades upon request. Standard and H2S applications.
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