Pressure operated circulation valve

Details Pressure operated circulation valve Pressure operated circulation valve

1990-06-04

1991-09-17

Kisliuk, Bruce M.

Wells

Processes

Operating valve, closure, or changeable restrictor in a well

166319, 166321, 166386, E21B 3410

Patent

active

050486110

ABSTRACT:
A circulating valve for use in oil field operations which is pressure operated without use of a wireline tool. The valve has a sleeve assembly with telescopically joined sleeve members normally closing off a circulation port in a mandrel. A pressure differential is utilized to shift the joined sleeve members to an unjoined condition opening the circulation ports. A second pressure differential is utilized to rejoin the sleeve members and close off the circulation ports. The sleeve members are independently shear pinned to the mandrel.

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patent: 4574894 (1986-03-01), Jadwin
patent: 4576233 (1986-03-01), George
patent: 4880058 (1989-11-01), Lindsey et al.

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