دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a spool-shaped attachment on the end of the catshaft. around which rope for hoisting and moving heavy equipment on or near the rig floor is wound. See break- out cathead, makeup cathead.

n: A spool-shaped extension of the drawworks shaft used to lift heavy equipment around the rig and make-up or break-out the drill pipe.