Low pressure responsive tester valve with ratchet

Details Low pressure responsive tester valve with ratchet Low pressure responsive tester valve with ratchet

1985-12-12

1987-05-26

Novosad, Stephen J.

Wells

Valves, closures or changeable restrictors

Fluid operated

166240, 166324, E21B 3400

Patent

active

046677437

ABSTRACT:
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 relative 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.

REFERENCES:
patent: 3051240 (1962-08-01), Fisher, Jr.
patent: 3897825 (1975-08-01), Tausch
patent: 3930540 (1976-01-01), Holder et al.
patent: 4113012 (1978-09-01), Evans et al.
patent: 4324293 (1982-04-01), Hashbek
patent: 4355685 (1982-10-01), Beck
patent: 4422506 (1983-12-01), Beck
patent: 4429748 (1984-02-01), Beck
patent: 4489786 (1984-12-01), Beck
patent: 4498536 (1985-02-01), Ross et al.
patent: 4515219 (1985-05-01), Beck
patent: 4537258 (1985-08-01), Beck

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