Remote controlled tubing safety valve

Details Remote controlled tubing safety valve Remote controlled tubing safety valve

1977-03-04

1978-05-02

Schwadron, Martin P.

Fluid handling

Line condition change responsive valves

Direct response valves

166321, 251 636, F16k 1702

Patent

active

040869350

ABSTRACT:
A remote-controlled tubing safety valve having a check valve and a remotely controlled valve member operator movable between two positions. When the valve member operator is in a first position the check valve is maintained open. When the valve member operator is in a second position it does not interfere with the operation of the check valve. This abstract is neither intended to define the invention of the application which, of course, is measured by the claims, nor is it intended to be limiting as to the scope of the invention in any way.

REFERENCES:
patent: 2894715 (1959-07-01), Bostock
patent: 3007669 (1961-11-01), Freed
patent: 3035808 (1962-05-01), Knox
patent: 3837403 (1974-09-01), Mott
patent: 3860066 (1975-01-01), Pearce et al.
patent: 3870101 (1975-03-01), Helmus
Composite Catalogue of Oil Field Equipment & Services, 1974-1975, pp. 3995, 3997, 3998, 4008, 4011 and 4014.

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