دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: In order to guarantee turbine motor working normally, there is a adequate require for axial clearance. When installing turbine motor, we shoule choose the adequate height to adjust the axial clearance of turbine motor.

n: a velocitymeasuring device in which gas flow is parallel to the rotor axis and the speed of rotation is proportional to the rate of flow.

n: in turbine operations, a constant that accounts for the difference between theoretical rotor speed and actual rotor speed.

n: a compressor in which the flow of gas to be compressed is moved away from the centre rapidly, usually by a series of blades or turbines. It is a continuous-flow compressor with a low pressure ratio and is used to transmit gas through a pipeline. Gas passing through the compressor contacts a rotating impeller, from which it is discharged into a diffuser, where its velocity is slowed and its kinetic energy changed to static pressure. Centrifugal compressors are nonpositive-displacement machines, often arranged in series on a line to achieve multistage compression.

n: The interrelationship among torque of turbine, horsepower, drop of pressure, efficiency and rotate speed. Reflects the working condition of turbine.

n: Consisted by two or more turbine motors which have the same compositions. Used for deep well drilling.

n: The drill rig whose drawworks, rotary table and drilling pump are driven by direct current motor. The direct current motor is driven by diesel engine or gas turbine.

n: Usually refers to turbine motor and positive displacement drill.

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).