Valve

Details Valve Valve

1981-02-09

1983-04-05

Novosad, Stephen J.

Wells

Valves, closures or changeable restrictors

Destructible element

166323, 175318, 13761411, E21B 3414

Patent

active

043788475

ABSTRACT:
A method for protecting a well formation during gravel packing in which a back pressure valve is held off of its seat while gravel is being placed in the well, is automatically closed as the wash pipe is removed from the screen and in which the valve is returned to open position by a force exerted from above, either hydraulic or mechanical.
A valve is held open by a prop-out which is removable to permit the valve to swing to closed position and thereafter the valve is again opened in response to mechanical or hydraulic force from above.

REFERENCES:
patent: 3385370 (1968-05-01), Knox et al.
patent: 3786866 (1974-01-01), Tausch et al.
patent: 3901333 (1975-08-01), Mori
patent: 4160484 (1979-07-01), Watkins
patent: 4256282 (1981-03-01), Goldschild et al.
patent: 4294314 (1981-10-01), Miyagishima et al.

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