Reverse cementing valve
First Claim
1. A valve assembly, comprising:
- an outer housing having one or more ports;
a closing sleeve movable in one direction from an open position to a closed position to close fluid flow through the ports;
a locking device operable to temporarily secure the closing sleeve in the open position and movable in an opposite direction to release the closing sleeve for movement to the closed position; and
an opening sleeve movable relative to the outer housing to open fluid flow through the ports of the outer housing and into the valve assembly.
10 Assignments
0 Petitions
Accused Products
Abstract
A method and apparatus for conducting a reverse flow operation. The apparatus may be lowered into a wellbore on a work string, and includes an opening device, a closing device, and a locking device disposed in a housing. Pressurized fluid supplied through the work string may actuate the opening device to open fluid flow through ports in the housing. Pressurized fluid from the annulus may be supplied through the port in the reverse flow direction to actuate the locking device to enable fluid flow up through the work string back to the surface, and to release the closing device. Pressurized fluid supplied through the work string may actuate the closing device to close fluid flow through the ports in the housing.
62 Citations
27 Claims
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1. A valve assembly, comprising:
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an outer housing having one or more ports; a closing sleeve movable in one direction from an open position to a closed position to close fluid flow through the ports; a locking device operable to temporarily secure the closing sleeve in the open position and movable in an opposite direction to release the closing sleeve for movement to the closed position; and an opening sleeve movable relative to the outer housing to open fluid flow through the ports of the outer housing and into the valve assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of conducting a wellbore operation, comprising:
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providing a valve assembly for operation in a wellbore using a work string; moving an opening sleeve of the valve assembly using pressurized fluid supplied through the work string to open fluid flow through one or more ports; moving a locking device of the valve assembly using pressurized fluid supplied from an annulus surrounding the valve assembly through the one or more ports to release a closing sleeve of the valve assembly; and moving the closing sleeve using pressurized fluid supplied through the work string to close fluid flow through the one or more ports. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A valve assembly, comprising:
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an outer housing having one or more ports; a closing sleeve movable from an open position to a closed position to close fluid flow through the ports, the closing sleeve temporarily secured in the open position using a fixing member; a locking device temporarily retaining the fixing member to maintain the closing sleeve in the open position, wherein movement of the locking device in one direction releases the fixing member, thereby enabling the closing sleeve to move in an opposite direction towards the closed position; and an opening sleeve movable relative to the outer housing to open fluid flow through the ports of the outer housing and into the valve assembly. - View Dependent Claims (24, 25)
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26. A valve assembly, comprising:
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an outer housing having one or more ports; a closing sleeve movable from an open position to a closed position to close fluid flow through the ports; a locking device operable to temporarily disallow movement of the closing sleeve to the closed position, wherein the locking device is movable in one direction to allow movement of the closing sleeve in an opposite direction to the closed position; and an opening sleeve movable relative to the outer housing to open fluid flow through the ports of the outer housing and into the valve assembly.
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27. A valve assembly, comprising:
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an outer housing having one or more ports; a closing sleeve having an open position in which fluid flow through the ports is permitted and a closed position in which fluid flow through the ports is prevented; a locking device temporarily retaining the closing sleeve in the open position, wherein the locking device is movable in one direction to release the closing sleeve, and wherein the closing sleeve moves in an opposite direction from the open position to the closed position; and an opening sleeve movable relative to the outer housing to open fluid flow through the ports of the outer housing and into the valve assembly.
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Specification