Circulating valve

Details Circulating valve Circulating valve

1976-02-25

1977-06-28

Leppink, James A.

Wells

Valves, closures or changeable restrictors

Destructible element

137 71, F04F 108, E21B 4312

Patent

active

040319601

ABSTRACT:
Disclosed is a circulating valve for use in a well. The circulating valve includes a valve plug initially blocking flow through the valve which moves to a position permitting flow through the valve upon the application of a predetermined pressure differential across the valve plug. This abstract is neither intended to define the scope of the invention, which, of course, is measured by the claims, nor is it intended to be limiting in any way.

REFERENCES:
patent: 2128253 (1938-08-01), Johnson
patent: 2919709 (1960-01-01), Schwegman
patent: 3282348 (1966-11-01), Artigue
patent: 3807428 (1974-04-01), Watkins et al.

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