دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

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.

an artificial lift system, common to low pressure, lower rate oil wells, with a plunger type bottom hole pump operated from the surface by a rod string.

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 reduction unit between a prime mover and a beam pumping unit that reduces the prime movers output speed by means of a series of chains.

n: the effect of counterweights on a beam pumping unit. The approximate ideal counterbalance effect is equal to half the weight of the fluid plus the buoyant weight of the rods.

n: an arm keyed at right angles to a shaft and used for changing radius of rotation or changing reciprocating motion to circular motion or circular motion to reciprocating motion. On a beam pumping unit, the crank is connected by the pitman to the walking beam, thereby changing circular motion to reciprocating motion.

n: a steel member connected to each end of the shaft extending from each side of the speed reducer on a beam pumping unit.