دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a drilling tool made up in the drill string directly above the bit. It causes the bit to turn while the drill string remains fixed. It is used most often as a deflection tool in directional drilling, where it is made up between the bit and a bent sub (or, sometimes, the housing of the motor itself is bent). Two principal types of down-hole motor are the positive-displacement motor and the downhole turbine motor. Also called mud motor.

n: A special tool mounted in the BHA (q.v.) to drive the bit without rotating the drill string from surface (see positive displacement motor).

n: Type of positive displacement motor.

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.

n: type of positive displacement motor.

positive displacement motor.

n: it also called helicoid hydraulic motor or positive displacement motor, the assembly that drived by the positive displacement motor.

n: a drilling tool that is located near the bit and used to rotate the bit without having to reture the intire drill string. A spiral rotor is forced to rotate within a rubber sleeved stator by pumping mud through yhe tool. Sometimes called a moineau pump