Circulating valve responsive to fluid flow rate therethrough and

Details Circulating valve responsive to fluid flow rate therethrough and Circulating valve responsive to fluid flow rate therethrough and

1999-03-10

2000-08-29

Dang, Hoang

Wells

Processes

Operating valve, closure, or changeable restrictor in a well

166319, 166320, 166321, 166240, 166386, E21B 3410

Patent

active

061093548

ABSTRACT:
A circulating valve and associated methods of servicing a well provide reliable operation, economical manufacture, and convenient maintenance in the circulating valve which is responsive to flow of fluid therethrough, and increased versatility in well servicing operations utilizing the valve. In a preferred embodiment, a circulating valve includes an upper case having a reverse circulating port formed radially therethrough, a circulating case having a circulating port formed radially therethrough, a lower adapter, a mandrel having a flow port formed radially therethrough, a biasing member, a ratchet, an inner sleeve, and a one-way flow restrictor carried on the mandrel. In an open configuration, fluid communication is permitted between the flow and circulating ports, and between the reverse circulating port and the flow restrictor. In a closed configuration, fluid communication is not permitted radially through the valve. A predetermined pressure differential across the mandrel is utilized to configure the valve in its open and closed configurations.

REFERENCES:
patent: 4113012 (1978-09-01), Evans et al.
patent: 4355685 (1982-10-01), Beck
patent: 4403659 (1983-09-01), Upchurch
patent: 4527629 (1985-07-01), Whiteley et al.
patent: 4650001 (1987-03-01), Ringgenberg
patent: 4718494 (1988-01-01), Meek
patent: 5355959 (1994-10-01), Walter et al.
patent: 5609178 (1997-03-01), Hennig et al.
patent: 5649597 (1997-07-01), Ringgenberg

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