Circulating kill valve

Details Circulating kill valve Circulating kill valve

1986-10-03

1988-02-16

Novosad, Stephen J.

Wells

Valves, closures or changeable restrictors

Destructible element

166319, 166332, E21B 3410, E21B 3414

Patent

active

047249080

ABSTRACT:
A circulating kill valve having a body with an initially closed port which is opened in response to pressure in the body. A shifting sleeve in the body is releasably held in a position closing the port, and a normally opened valve connected to the sleeve is closed in response to a pressure increase on the orifice. Closing of the valve stop fluid flow and shifts the sleeve to an open position.

REFERENCES:
patent: 3025919 (1962-03-01), Angel et al.
patent: 4399871 (1983-08-01), Adkins et al.
patent: 4566478 (1986-01-01), Deaton
G. M. Raulins, "Platform Safety by Downhole Well Control", 10-3-1971, SPE Meeting, pp. 1-9.

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