Full-bore well tester with hydrostatic bias

Details Full-bore well tester with hydrostatic bias Full-bore well tester with hydrostatic bias

1980-12-23

1984-04-03

Pate, III, William F.

Wells

Valves, closures or changeable restrictors

Fluid operated

166324, 166250, E21B 3406

Patent

active

044402309

ABSTRACT:
In accordance with an illustrative embodiment of the present invention, a pressure controlled well tester apparatus having a full-bore ball valve closure element includes valve actuator means responsive to changes in the pressure of fluids in the well annulus for moving the ball valve between its open and closed positions, and bias means responsive to the hydrostatic pressure of fluids in the well bore for assisting in moving the ball valve to its fully closed position.

REFERENCES:
patent: Re29638 (1978-05-01), Nutter
patent: 3964305 (1976-06-01), Wray
patent: 4064937 (1977-12-01), Barrington
patent: 4105075 (1978-08-01), Helmus
patent: 4144937 (1979-03-01), Jackson

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