Lift subs
OCTL Lift Subs are made from AISI 4140/ 4145H modified alloy steel, fully heat treated to a Brinell Hardness range of 285 – 341 and have an IZOD impact strength of minimum 40 ft-lbs. The connections are machined, cold rolled, and phosphatized to prevent galling during initial make-up, and are shipped with pressed steel thread protectors installed.For Lift Subs, please specify:
Drill Collar OD
Tool Joint OD
Tapered, square shoulder or combination
Drill Pipe OD
Drill Collar connection size and type
Bore
Note: Add 6 inches to overall length for a box in the top of the Lift Sub.
