E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/41
E21B 34/10 (2006.01)
Patent
CA 1272681
Abstract Of The Disclosure An annulus pressure responsive tester valve includes a tool housing having a flow passage disposed therethrough. A ball valve is disposed in the flow passage and rotatable between closed and open positions. An actuating mandrel is operably connected to the ball valve. An annular power piston is disposed within the housing and reciprocates rela- tive to the housing in response to changes in well annulus pressure. A lug and slot ratchet assembly operably connects the ball valve with the power piston for moving the ball valve between its closed and open positions in response to movement of the power piston within the housing.
525343
Beck Harold Kent
Ringgenberg Paul David
Company Halliburton
Swabey Ogilvy Renault
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