Open well plunger-actuated gas lift valve and method of use

Details Open well plunger-actuated gas lift valve and method of use Open well plunger-actuated gas lift valve and method of use

2005-06-21

2005-06-21

Walker, Zakiya (Department: 3672)

Wells

With eduction pump or plunger

Receptacles

C166S068000, C166S110000, C166S169000, C166S332400

Reexamination Certificate

active

06907926

ABSTRACT:
A system is provided for unloading accumulated liquids and enhancing the recovery of gas from a reservoir having diminished pressure. An annulus between a tubing string and casing is isolated by a packer and continually pressurized with a slipstream of compressed gas while the well continues to produce. A unique valve positioned in the tubing string is shuttled between a production position in which production fluids are permitted to bypass the valve to the surface and a lift position in which the bypass is blocked and an unloading port is opened to vent high pressure annulus gas to the tubing string above the valve, lifting accumulated liquids with it. Preferably, the valve is actuated to the lift position by the impact of a plunger dropped from a lubricator at the wellhead, when the pressure in the annulus has reached a predetermined threshold. When the gas has been vented and the pressure in the annulus drops, the valve is actuated to the uphole production position as a result of the higher reservoir pressure.

REFERENCES:
patent: 4036297 (1977-07-01), Swihart, Sr.
patent: RE31845 (1985-03-01), Peters
patent: 4682656 (1987-07-01), Waters
patent: 4708595 (1987-11-01), Maloney et al.
patent: 5211242 (1993-05-01), Coleman et al.
patent: 5253713 (1993-10-01), Gregg et al.
patent: 6148923 (2000-11-01), Casey
patent: 6554580 (2003-04-01), Mayfield et al.
patent: 6705404 (2004-03-01), Bosley

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