Valves

Details Valves Valves

1986-10-24

1988-09-06

Novosad, Stephen J.

Wells

Valves, closures or changeable restrictors

Fluid operated

166 651, E21B 3408

Patent

active

047685948

ABSTRACT:
There are disclosed two embodiments of a valve for closing a well conduit within a wall bore to flow therethrough automatically in response to the loss of a controlled condition. Each embodiment of the valve has means in which energy may be generated, in response to bleeding off of pressure above the closed valve. So long as the controlled condition is maintained, the return of a pressure balance across the closed valve will permit the release of generated energy to open the valve. The loss of the controlled condition releases further generated energy to close the valve.

REFERENCES:
patent: 1026041 (1912-05-01), Kimball
patent: 2321095 (1943-06-01), Mantz
patent: 2875616 (1959-03-01), Marks
patent: 3355139 (1967-11-01), Kittredge
patent: 3358207 (1967-12-01), Natho
patent: 3604679 (1971-09-01), Pennington
patent: 3665955 (1972-05-01), Conner, Sr.
patent: 3731742 (1973-05-01), Sizer
patent: 4002202 (1977-01-01), Huebsch et al.
patent: 4129184 (1978-12-01), Parker
patent: 4161215 (1979-07-01), Bourne, Jr. et al.
patent: 4191248 (1980-03-01), Huebsch et al.
patent: 4375239 (1983-03-01), Barrington et al.
patent: 4386422 (1983-05-01), Mumby et al.

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