Low pressure responsive APR tester valve

Details Low pressure responsive APR tester valve Low pressure responsive APR tester valve

1980-11-05

1983-12-27

Pate, III, William F.

Wells

Valves, closures or changeable restrictors

Fluid operated

166264, 166374, E21B 3410

Patent

active

044225067

ABSTRACT:
An annulus pressure responsive tester valve including a pressure assisted isolation valve which includes a pressure differential metering cartridge to control the rate at which the isolation valve returns to the fluid pressure in the annulus between the wellbore and testing string thereby continuously controlling the rate of expansion the inert gas within the gas chamber and the attendant operation of the tester valve regardless of any temperature effect by cold fluids pumped therethrough.

REFERENCES:
patent: 3323550 (1967-06-01), Lee
patent: 3584684 (1971-06-01), Anderson et al.
patent: 3664415 (1972-05-01), Wray et al.
patent: 3814182 (1974-06-01), Giroux
patent: 3856085 (1974-12-01), Holden et al.
patent: 3858649 (1975-01-01), Wray et al.
patent: 3860069 (1975-01-01), Wray
patent: 3976136 (1976-12-01), Farley et al.
patent: 4083409 (1978-04-01), Barrington
patent: 4113012 (1978-09-01), Evans et al.

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