Fluid lifting apparatus

Details Fluid lifting apparatus Fluid lifting apparatus

1976-10-04

1977-09-27

Freeh, William L.

Pumps

One fluid pumped by contact or entrainment with another

Liquid pumped by supplying or exhausting gaseous motive...

417126, F04F 108, F04F 112

Patent

active

040508544

ABSTRACT:
A fluid lifting apparatus operable by air pressure applied alternately to first and second pairs of cylinders each of said cylinders having a main body part, a barrel and a bottom chamber in communications with a bottom inlet. Pressuring of the main body part of the chamber, closes a check valve at the inlet and forces fluid from the main body part, through a fluid flow valve, through the chamber and up the barrel to a production tubing segment and hence to the next higher cylinder. Emptying of the main chamber closes the fluid flow valve to prevent air from the production tubing. However, the valve is positively opened once fluid flow in the bottom chamber from the inlet is reinstituted. Air vent means to the surface and/or to the well annulus rapidly depressurizes the cylinders and hence speeds cycling between the alternate cylinder pairs.

REFERENCES:
patent: 1356684 (1920-10-01), Aikman
patent: 1741115 (1929-12-01), Parrish
patent: 1960448 (1934-05-01), Meyer
patent: 2849963 (1958-09-01), Duby

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