Drill Collar Lift Subs

Drill Collar Lift Subs are one-piece construction and manufactured from 4145H or 4140H alloy steel. Drill Collar Lift Subs comes with 18 degree tapered shoulder. They are machined and heat-treated according to drill collar specifications.

Lifting sub is the special tools for lifting of the drill tools in petroleum, natural gas industry and geologic exploration. There are two types for drill tool lifting sub in structure: type A or B. Type A lift sub is with 18 degree shoulder, and type B is with 90 degree shoulder. All lifting subs are complied with API standard.