دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: (slang) the position in which the mast on a mobile rig is resting horizontally over the drivers cab.

n: the post on cable-tool rigs that supports the end of the walking beam when the rig is not operating.

n: the safe prop under the forearm of the balance beam on cable drilling ,used to prevent the worker being hurt when the back end of the balance beam breakups