دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

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

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: a weight applied to compensate for existing weight or force. On pumping units in oil production, counterweights are used to offset the weight of the column of sucker rods and fluid on the upstroke of the pump, and the weight of the rods on the downstroke.

n: see counterbalance weight.

n: the fixed metal colpus in the right end of the fluid balance to regulate the equilibrium of balance

n: the ann that connects the crank to the walking beam on a pumping unit by means of which rotary motion is converted to reciprocating motion.

the connecting rod from the rotating counterweights to the beam on a beam lift pumping unit.

n: a Y -shaped chain used to spin up (tighten) one joint of drill pipe into another. In use, one end of the chain is attached to the tongs, another end to the makeup cathead, and the third end is free. The free end is wrapped around the tool joint, and the cathead pulls the chain off the joint, causing the joint to spin (turn) rapidly and tighten up. After the chain is pulled off the joint, the tongs are secured in the same spot, and continued pull on the chain (and thus on the tongs) by the cathead makes up the joint to final tightness.

a chain moved by a counterweight or winch to assist in making up drill pipe joints.