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: a tubular, perforated device attached to the bottom of a sucker-rod pump that helps to prevent gas lock. The device works on the principle that gas, being lighter than oil, rises. As well fluids enter the anchor, gas breaks out of the fluid and exits from the anchor through perforations near the top. Remaining fluids enter the pump through a mosquito bill (a tube within the anchor),which has an opening near the bottom. In this way, all or most of the gas escapes before the fluids enter the pump.

a gas separation device, usually a perforated pipe section, in a beam lift well that helps break gas out of the liquids, preventing gas entry and resultant gas lock of the pump.

n: I. a condition sometimes encountered in a pumping well when dissolved gas, released from solution during the upstroke of the plunger, appears as free gas between the valves. If the gas pressure is sufficient, the standing valve is locked shut, and no fluid enters the tubing. 2. a device fitted to the gauging hatch on a pressure tank that enables manual dipping and sampling without loss of vapour. 3. a condition that can occur when gas-cut mud is circulated by the mud pump. The gas breaks out of the mud, expands, and works against the operation of the piston and valves.

n: the low-pressure area of induction port in pump is filled with departed free gas，which will cause suck inproperly even cutout。

a gas retention device that permits gauging the tank without loosing gas to the atmosphere.

a pump filled with gas that it cannot expel and where no further fluid will enter the pump. Common in beam lift pumps that pump off or are used in high GOR wells.