Fluid level controlled safety valve

Details Fluid level controlled safety valve Fluid level controlled safety valve

1984-08-29

1988-01-26

Novosad, Stephen J.

Wells

Valves, closures or changeable restrictors

Fluid operated

166321, 166324, E21B 3406

Patent

active

047211628

ABSTRACT:
A well safety valve for use in a fluid well conduit through which fluid is produced by pumping. A body is adapted to be inserted into the conduit and includes a passageway for well fluid. A valve in the passageway opens and closes in response to the fluid level or hydrostatic pressure in the conduit. When pumping is discontinued, the fluid level in the conduit increases to a predetermined high level to close the valve. When pumping begins, the fluid level falls and when it reaches a predetermined low level the valve is opened. The valve includes an equalizing device.

REFERENCES:
patent: 3071151 (1963-01-01), Sizer
patent: 3310114 (1967-03-01), Dollison
patent: 3860066 (1975-01-01), Pearce et al.
patent: 4103744 (1978-08-01), Akkerman
patent: 4140153 (1979-02-01), Deaton

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