Oil well pump

Details Oil well pump Oil well pump

1974-01-02

1977-03-22

Freeh, William L.

Pumps

Expansible chamber type

Valved piston

F04B 2104

Patent

active

040133877

ABSTRACT:
An oil well subsurface pump comprising a plunger reciprocally disposed within a working barrel and having check valve means carried thereby. Piston rings are provided on the outer periphery of the plunger for engaging the inner periphery of the working barrel during reciprocation of the plunger which preclude bypassing of the plunger by the well fluid and permit an efficient pumping action upon each stroke of the pump without slippage.

REFERENCES:
patent: 654316 (1900-07-01), Lewis
patent: 1060622 (1913-05-01), Owen
patent: 1588705 (1962-06-01), Cope et al.
patent: 1777959 (1930-10-01), Budlong
patent: 1785834 (1930-12-01), Kilgore
patent: 2590245 (1952-03-01), Harbison
patent: 2745660 (1956-05-01), Delahay
patent: 3168052 (1965-02-01), Pate
patent: 3586464 (1969-12-01), Crowe

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