Test valve having automatic bypass for formation pressure

Details Test valve having automatic bypass for formation pressure Test valve having automatic bypass for formation pressure

1977-07-21

1978-08-08

Leppink, James A.

Wells

Valves, closures or changeable restrictors

Fluid operated

166264, 166324, E21B 4300, E21B 4700

Patent

active

041050754

ABSTRACT:
Well test apparatus having, in a well, an annulus therearound. An elongated housing has a fluid passage extending longitudinally therethrough and a fluid passage opening and closing means for such passage. A further fluid passage permits fluid flow through the housing from the longitudinally extending passage to the annulus. A differential pressure responsive valve means for the further passage is responsive to pressure in the longitudinally extending passage for urging the valve means open to fluid flow in the further passage from the longitudinally extending passage to the annulus, and is responsive to annulus pressure for urging the valve means to a closed condition for fluid flow through the further passage.

REFERENCES:
patent: 3664415 (1972-05-01), Wray
patent: 3856085 (1974-12-01), Holden
patent: 3858649 (1975-01-01), Wray et al.
patent: 3861470 (1975-01-01), Mott
patent: 3964544 (1976-06-01), Farley et al.
patent: 4011906 (1977-03-01), Alexander et al.
patent: 4049052 (1977-09-01), Arendt

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