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.

(pronounced Iced") n pi: the pipe tongs suspended in the derrick or mast and operated by a chain or a wire rope connected to the makeup cathead or the break- out cathead. Personnel call the makeup tongs the lead tongs if pipe is going into the hole;similarly, they call the breakout tongs the lead tongs if pipe is coming out of the hole. Compare backup tongs.

n: a pipe tong suspended in the dercick, normally on the left of the driller, used when coming out of the hole to break the connection operated through wire line tied to breakout cathead. Inthis operation it is on pin end of joint to be broken. During makeup