دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a part made of coils of wire placed around a metal core, in which electric current is induced in a generator, or in which input current interacts with a magnetic field to produce torque in a motor.

n pl: the tongs latched on the drill pipe joint hanging in the totary by the slips, used to keep the pipe from turning as the makeup or breakout tongs (the lead tongs) apply torque to make up or break out the tightened tool joint connection. Compare lead tongs.

n: A tong suspended in the derrick, normally on the drillers right, used to hold box end of the tool joint while the pin end is loosened and unscrewed. Also called a make-up tong, as it is moved to pin end to tighten the joint to the recommended torque after

n: a tool joint box which has been subjected to a torque which has resulted in permanent enlargement of the box diameter. This normally occurs adjacent to the box sealing shoulder.

n: The maximal brake torque produced by brake gear when laying down safely.

n: The spin table is controlled to be convenient for removing drill bit and holding reactive torque when using mud motor.

n: see starting torque. break circulation v: to start the mud pump for restoring circulation of the mud column. Because the stagnant drilling fluid has thickened or gelled during the period of no circulation, high pump pressure is usually required to break circulation.

n: the maximum torque an induction motor will develop as load is increased, starting from full speed at no load until the motor begins to stall.

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

n: the torque on bit measured by measurement while drilling

n: a kind of well deviation theory ,when drill the different-hardness layer ,the torque caused by the heterogeneous distribution of the pressure affects the drift direction