دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

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 large circular gear in a mud pump that is driven by the prime mover and that, in turn, drives the connecting rods.

n: The big and round gear installed in drilling pump.

n pi: the equipment included in the drilling fluid circulating system of a rotary rig. Basically, the components consist of the mud pump, the rotary hose, the swivel, the drill stem, the bit, and the mud return line.

n: Mainly including mud pump, revolving drilling hose, swivel, drill string, bit and mud return line.

n: the pressure generated by the mud pumps and exerted on the drill stem.

the pressure generated by the mud pumps and, in normal circulation, exerted on the drill string.

n: the movement of drilling fluid out of the mud pits, down the drill stem, up the annulus, and back to the mud pits. See normal circulation, reverse circulation.

n: The movement of drilling fluid through the flow system on a drilling or workover rig. This circulation starts at the suction pit and goes through the mud pump, drill pipe, bit, annular space in the hole, flowline, fluid pits, and back again to the suction

n: The total time that drill fluid returns to the drill fluid pool through mud pump, swivel, drill pipe, drill bit, annular and purification plant.

n: on a mechanical-drive rig, the type of transmission that sends power from the engines to the drawworks and the rotary table, and sometimes to the mud pumps. See also transmission.

n: The driving gear that is assembled by several power machines.

n: 1. a forged-metal shaft that joins the piston of an engine to the crank-shaft. 2. the metal shaft that is joined to the bull gear and crosshead of a mud pump.

n: the relatively small amount of gas enters a well when the mud pump is stopped for a connection to be made. Since bottomhole pressure decreases when the pump is stopped, gas may enter the well.

the small amount of gas that enters the wellbore when circulation is stopped to make a connection. The gas only enters the wellbore in this case when the static fluid pressure is less than the pore pressure.

n: the block in a mud pump that is guided to move in a straight line and serves as a connection between the pony rod and the Commenting rod.

n: The scroll box of drill pump, moving along guide in right line. Used to connect drag link and pitman.