دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

a surface piston driven pumping unit, similar to a beam lift unit.

n: a beam pumping unit on which the counterbalancing is done by means of an air cylinder.

n: the weights on a beam pumping unit installed on the end of the walking beam, which is opposite the end over the well. The counterbalance offsets, or balances, the weight of sucker rods and other downhole equipment installed in the well.

n: a machine designed specifically for sucker rod pumping. An engine or motor (prime mover) is mounted on the unit to power a rotating crank. The crank moves a horizontal member (walking beam) up and down to produce reciprocating motion. This reciprocating motion operates the pump. Compare pump jack.

n: a well whose fluid is being lifted by rods and pump actuated by a beam pumping unit.

n: a beam pumping unit that has a counterbalance weight on the walking beam.

n: a cable on a pumping unit, looped over the horsehead and connected to the carrier bar to support the polished rod clamp. See sucker rod pumping.

v: to cause the pump on a pumping unit to hit the bottom of the well by having too long a sucker rod string in the unit.

n: a sucker rod pumping unit. not commonly used. that employs cable wound around a spool. one end going into the hole. the other with a suspended counterweight. This type of unit can achieve 40- to SO-foot ( 12- to 24- metre) stroke lengths. reducing dynamic loads, rod reversals. gas locking. and power usage and can be applied to deep pump applications