دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: refer to downhole motor

n: the direct current motor used to drive the reel ,harp ,swivel and drilling pump

n pi: see kelly bushing rollers. drive shaft n: in a top drive, d1e shaft that comes out of the drives drilling motor. Usually, crew members attach a saver sub (a short pipe fitting) to the drive shaft and attach the top joint of drill pipe to the sub. The drive shaft transmits the motors rotating fon:e to the drill string and bit. See top drive.

n: refer tokelly bushing rollers

a downhole drilling motor with a bent housing that can turn a well’s direction in addition to turning the bit.