Wells – Valves – closures or changeable restrictors – Fluid operated
Patent
1992-09-22
1994-10-18
Britts, Ramon S.
Wells
Valves, closures or changeable restrictors
Fluid operated
E21B 3408
Patent
active
053559592
ABSTRACT:
A differential pressure operated valve for use as a circulating and/or deflation valve in a well bore. The valve comprises a housing defining first and second bores therethrough and a passage providing communication between the interior and exterior of the housing. A valve sleeve is slidably disposed in the housing and has a first outer surface slidably disposed in the first bore and a second outer surface slidably disposed in the second bore. A valve port is defined in the valve sleeve providing communication between a central opening thereof and the passage in the housing when the valve sleeve is in an open position. When the valve sleeve is closed, the valve port and passage are isolated from one another. The first and second outer surfaces of the valve sleeve define a differential area, and the valve is closed by fluid flow creating a differential pressure acting across this area. A spring biases the valve toward the open position. A mandrel may be disposed in the valve which has a flange thereon for locking the valve sleeve in the closed position. A mandrel port defined in the mandrel is in communication with the passage in the housing when the valve sleeve is in the open position.
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Tucker James C.
Walter Jeffrey S.
Zimmerman John C.
Britts Ramon S.
Duzan James R.
Halliburton Company
Kennedy Neal R.
Tsay Frank S.
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