دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: A rig whose every clutch and drawworks brakestaff are controled by compressive air. Usually assisted with hydraulic brake and dynamic brake.

n: a clutch containing an inflatable tube that, when inflated, causes the clutch to engage the driven member. When the tube is deflated, disengagement occurs.

adj: equipment activated by compressed air, as are the clutch and the

n: a coupling used to connect and disconnect a driving and a driven part of a mechanism, especially a coupling that permits the former part to engage the latter gradually and without shock. In the oilfield, a clutch permits gradual engaging and disengaging of the equipment driven by a prime mover. v: to engage or disengage a clutch.

n: I. a mechanism used to transmit power from the engines to the pump, the drawworks, and other machinery on a drilling rig. It is composed of clutches, chains and sprockets, belts and pulleys, and a number of shafts, both driven and driving. 2. a substance formed by the chemical union of two or more elements in definite proportions;the smallest particle of a chemical compound is a molecule. v: to connect two or more power-producing de- vices, such as engines, to run driven equipment, such as the drawworks.

n: Refers to the situation that the block strikes crown pulley when crown block saver is out of order and the clutch is not reliefed timely.

v: Declutch the clutch to drive drill fixture and tripping because using original motive.

n: a type of friction clutch that has a metal housing lined with an expandable diaphragm and pads of friction material called friction shoes. The pressure of the expanded diaphragm squeezes the friction shoes against a drum attached to the driving shaft. Friction between the shoes and the drum allows the clutch to engage. See clutch. Compare plate clutch.

n: the turning part used to link the drum and drum shaft or take them off

n: the action in which the clutch used between an auxiliary hydrodynamic brake and the drawworks drumshaft automatically disengages and runs freely while the empty block is being hoisted.

n: a clutch that makes connection by sliding friction.