Fluid pressure actuator for subterranean well apparatus

Details Fluid pressure actuator for subterranean well apparatus Fluid pressure actuator for subterranean well apparatus

1982-07-06

1984-08-28

Purser, Ernest R.

Wells

Valves, closures or changeable restrictors

Fluid operated

166374, E21B 3410

Patent

active

044678703

ABSTRACT:
A valve for use in controlling flow in a subterranean well and using an expandable and contractable fluid sealing bellows is disclosed. The valve has a valve closure member such as a ball valve head acutated by an increase in control fluid pressure. Control pressure causes the bellows to expand or contract and a control rod engaging the bellows can be shifted. The control rod is part of an actuating mechanism for shifting the valve closure member between open and closed positions. The bellows can support the difference between control pressure and well pressure which are respectively present on the exterior and interior of each bellows element.

REFERENCES:
patent: 2731977 (1956-01-01), McGowen, Jr.
patent: 2797700 (1957-07-01), McGowen, Jr.
patent: 3310114 (1967-03-01), Dollison
patent: 3626969 (1971-12-01), Garrett
patent: 3747633 (1973-07-01), Garrett
patent: 3802504 (1974-04-01), Garrett
patent: 4161219 (1979-07-01), Pringle

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