Process and device for raising liquids from wells

Details Process and device for raising liquids from wells Process and device for raising liquids from wells

1996-12-12

1999-07-13

Neuder, William P.

Wells

Processes

Producing the well

1661773, E21B 4300

Patent

active

059213205

ABSTRACT:
The invention relates to the gas and oil producing industry and can be used in raising liquids from oil, gas and gas condensate wells. The process for raising liquids from wells involves periodically lowering a lowerable assembly into a tubing string and, subsequently lifting same with a column of liquid above it. Between the lateral surface of the lowerable assembly and the walls of oil well tubings is maintained a ring-shaped gap of constant width, while a lifting operation is carried out at definite speed when some of the gas from the well will pass through the ring-shaped gap from bottom to top preventing the liquid from flowing downwards. The device for raising liquids from wells includes a hoist with a cable, a tubing string and a lowerable assembly placed inside the string with a non-shaped valve fitted with centralizers and securely fastened to the said hoist cable. The lowerable assembly and its non-return valve can be embodied in a plurality of structural variations of the invention. The process and device as claimed make it possible to reduce power consumption for raising liquids from wells by using the pressure of blanket and/or injected gas without a particular sophistication of the lowerable device.

REFERENCES:
patent: 3500933 (1970-03-01), Burba, Jr. et al.
patent: 4813485 (1989-03-01), Coyle
patent: 5462115 (1995-10-01), Belden et al.
patent: 5620314 (1997-04-01), Worton
Sukhonosov, G.D., Ispytanie Neobsadnykh Skvazhin, 1978, Izdatelstvo "Nedra", p. 33, Moscow (See English Abstract).
Muraviev, I.M., Exploatatsiya . . . , pp. 210-213, (1949) Moscow-Leningrad (See English Abstract).

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