Annulus pressure controlled reversing valve

Details Annulus pressure controlled reversing valve Annulus pressure controlled reversing valve

1981-06-29

1984-10-02

Purser, Ernest R.

Wells

Valves, closures or changeable restrictors

Fluid operated

251 73, E21B 3410

Patent

active

044742428

ABSTRACT:
In accordance with an illustrative embodiment of the present invention, a pressure controlled reversing valve includes a housing defining a reversing port, a spring-loaded sleeve valve normally closing the reversing port, means for locking the sleeve valve in the closed position, an operator mandrel mounted for reciprocating movement within the housing, clutch means for shifting the locking means with the operator mandrel as it moves in one axial direction, means for urging the operator mandrel in the opposite axial direction, and means responsive to a series of excess annulus pressure changes for reciprocating the operator mandrel to causing shifting of the locking means by an amount sufficient to disable the same and permit the valve sleeve to open.

REFERENCES:
patent: Re29638 (1978-05-01), Nutter
patent: 3089546 (1963-05-01), Cochran
patent: 3850250 (1974-11-01), Holden et al.
patent: 3930540 (1976-01-01), Holden et al.
patent: 3970147 (1975-01-01), Jessup et al.
patent: 4044829 (1977-08-01), Jessup et al.
patent: 4058165 (1977-11-01), Holden et al.
patent: 4311197 (1982-01-01), Hushbeck
patent: 4324293 (1982-04-01), Hushbeck

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