Recloseable auxiliary valve

Details Recloseable auxiliary valve Recloseable auxiliary valve

1982-04-21

1984-07-10

Novosad, Stephen J.

Wells

Processes

Operating valve, closure, or changeable restrictor in a well

166334, 251 54, E21B 3412

Patent

active

044587627

ABSTRACT:
A recloseable auxiliary valve includes a cylindrical housing having a central flow passage disposed therethrough. A flapper valve is disposed in the housing and is movable between a closed position wherein the central flow passage is closed and an open position wherein the central flow passage is open. An operating mandrel is provided for operating the flapper valve upon telescoping movement of the mandrel relative to the housing. A releasable locking system is provided for locking the mandrel and the flapper valve in their open position. A time-delay system is provided to prevent premature telescopingly collapsing movement of the mandrel relative to the housing as the auxiliary valve is run into the well.

REFERENCES:
patent: Re29562 (1978-03-01), Wray et al.
patent: 2874927 (1959-02-01), Conrad
patent: 3249124 (1966-05-01), Berryman
patent: 3329214 (1967-07-01), Ehlert
patent: 3332495 (1967-07-01), Young
patent: 4113012 (1978-09-01), Evans et al.
patent: 4113018 (1978-09-01), Barrington et al.

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