دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

a solid body insert that replaces and blanks-off a gas lift mandrel pocket designed for a valve.

a section of pipe used in the tubing into which a gas lift valve can be inserted. The mandrel will allow communication with the annulus gas lift supply through the valve.

a type of gas lift mandrel that allows full bore passage. The valve “pocket” is on the side of the pipe.

a pressure operated valve, placed in a gas lift mandrels at designed points in the well. The gas lift supply gas is routed through the valves into the tubing. The top valves close and the lower valves open as the static liquid level drops in the well (the

gas lift valves where injection gas enters the valve and acts on the effective bellows area, overcoming the precharge in the valve and opening the valve (the retracting bellows lifts the needle off the seat) to allow gas lift gas flow from the gas filled

production fluid enters the valve and acts on the effective bellows area, compressing the bellows against the precharge pressure, lifting the needle off the seat and opening the valve. The injection gas then flows through the seat, through the reverse-flo

the process of cooling gas to -162oC, reducing its volume by 600 fold over the gas volume at standard conditions.

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。

n: an automatically operated valve that, by opening and closing in response to pressure, permits more or less gas to flow through a pipeline and thus controls the pressure.