Rapid cycle annulus pressure responsive tester valve

Details Rapid cycle annulus pressure responsive tester valve Rapid cycle annulus pressure responsive tester valve

E - Fixed Constructions

21

B

166/42

E21B 34/10 (2006.01) E21B 23/00 (2006.01) E21B 49/00 (2006.01) E21B 49/08 (2006.01) E21B 34/00 (2006.01)

Patent

CA 1271956

ABSTRACT The present invention comprises a rapid cycle tester valve operable in response to annulus pressure. The tester valve includes a valve ball rotatable between open and closed positions through an operating mechanism which includes a ball and slot ratchet mechanism for selectively transmitting operating movement from a pressure responsive slidable valve housing through a mandrel assembly. The valve housing employs back to back check valves disposed in a longitudinal valve passage to create pressure differentials to move the valve housing in response to annulus pressure increases and decreases.

536517

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