دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: see downhole motor.

n: a downhole component of drill string that rotates the bit without having to turn the rotary table. The term is sometimes applied to both positive displacement motors and turbodrills (q.v.).

a hydraulic powered motor used on the drilling sting or coiled tubing to provide rotation.