Oil well pumping tube drain device

Details Oil well pumping tube drain device Oil well pumping tube drain device

1978-03-13

1979-09-04

Freeh, William L.

Pumps

Including separate port on noncyclic valve for draining pump...

417443, 417545, F04B 2100, F04B 3900

Patent

active

041667158

ABSTRACT:
A specially designed valve is incorporated in the pumping tube of an oil well pump secured to the lower end of an oil well pipe string. In pumping the well, oil is drawn up through the pumping tube and oil pipe string to the surface. The check valve is arranged to be actuated from the surface of the well in response to lowering the sucker rods for operating the pump beyond the normal amplitude limits to thereby place into communication the oil in the pumping tube and pipe string with the annulus of the well between the well casing and exterior walls of the pumping tube pipe string thereby equalizing the hydrostatic pressure and permitting pulling of the well pipe for pump servicing or other operations.

REFERENCES:
patent: 2062058 (1936-11-01), Howe
patent: 2674200 (1954-04-01), Howe
patent: 2949861 (1960-08-01), Heath
patent: 2997963 (1961-08-01), Hatcher
patent: 3150605 (1964-09-01), Howe
patent: 4049365 (1977-09-01), Sparks

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