دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: 1. (obsolete) a worker who places pipe to one side in the derrick. 2. a pneumatic or hydraulic device often used on drill ships that, on command from an operator, either picks up pipe from a rack and lifts it into the derrick or takes pipe from out of the derrick and places it on the rack. It eliminates the need to stand pipe in the derrick or mast while it is out of the hole, which is desirable for maintaining the vessels centre of gravity as low as possible and for minimising the possibility of capsizing.

n: see tower hand.