Pumping system for oil production

Details Pumping system for oil production Pumping system for oil production

1981-11-06

1984-05-29

Smith, Leonard E.

Pumps

Combined

92159, 92162P, F04B 4708

Patent

active

044512120

ABSTRACT:
A pumping system for oil production comprises a hydraulic unit set on the ground and adapted to send out a pressure oil, and a pump unit set in an oil well and adapted to draw up crude oil therefrom. The pump unit comprises a pump cylinder, and a plunger reciprocatingly moved in the pump cylinder. The plunger is provided with a clearance formed between the outer circumferential surface of a lower end portion thereof and the inner circumferential surface of the pump cylinder. The pressure oil supplied from the hydraulic unit is ejected from the clearance along the inner surface of the pump cylinder into a cylinder chamber.

REFERENCES:
patent: 1597161 (1926-08-01), Kellogg et al.
patent: 1817659 (1931-08-01), Weaver
patent: 2371846 (1945-03-01), Ruthven
patent: 2567513 (1951-09-01), Haines
patent: 2764940 (1956-10-01), Long
patent: 2821141 (1958-01-01), Sargent
patent: 3098452 (1963-07-01), Davis
patent: 3295452 (1967-01-01), Smith
patent: 3802802 (1974-04-01), Greer
patent: 4383803 (1983-05-01), Reese

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