دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

unscrewing a joint of pipe of part of a BHA.

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.

n: a piece of the rig-floor equipment that can be used to make connections and is automatically controlled.

a pipe connection device that sits on the rig floor or is suspended just above the floor. It combines lead and backup tongs with a integral spinning table to spin the top joint during make-up or break-out.