Fluid controlled gas lift pump

Details Fluid controlled gas lift pump Fluid controlled gas lift pump

1989-05-09

1991-02-05

Smith, Leonard E.

Pumps

One fluid pumped by contact or entrainment with another

Liquid pumped by supplying or exhausting gaseous motive...

417137, F04F 106

Patent

active

049900617

ABSTRACT:
A well pumping system uses a closed gas cycle to periodically unload a pumping chamber in a well. The system includes a tubing string having a downhole pumping chamber providing a check valve at the lower end. A packing assembly defines the upper end of the pumping chamber and includes a dip tube having a check valve allowing upward liquid movement through the dip tube. A conduit passes through the packing assembly. Pressurized gas is periodically pumped down the conduit to force liquid upwardly through the dip tube and tubing string. Cycling of the pressurized gas is controlled by a liquid seal control assembly at the surface. When the pumping chamber has been unloaded, the gas therein flows up the conduit and through the seal control assembly to a suction tank. The pressurized gas is thus maintained in a closed cycle.

REFERENCES:
patent: 1744002 (1930-01-01), Price
patent: 1890720 (1932-12-01), Chenault
patent: 2265099 (1941-12-01), Chenault
patent: 2313066 (1943-03-01), Hatfield
patent: 2318029 (1943-05-01), Thompson et al.
patent: 3647319 (1972-03-01), McLean et al.
patent: 3894814 (1975-07-01), Morgan
patent: 3905724 (1975-09-01), Strebel
patent: 4625807 (1986-12-01), Harlow

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