Full-bore well tester with hydrostatic bias

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

E - Fixed Constructions

21

B

166/3

E21B 47/06 (2006.01) E21B 34/10 (2006.01) E21B 49/00 (2006.01) E21B 34/00 (2006.01)

Patent

CA 1171352

ABSTRACT OF DISCLOSURE In accordance with an illustrative embodiment of the present invention, a pressure controlled dwell 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.

392927

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