Downhole valve
First Claim
1. A downhole valve including:
- a body defining a flow passage;
a valve assembly mounted in the body, the valve assembly including a valve member being movable from a first configuration to a second configuration, in the first configuration the valve member preventing flow in at least one direction through the passage, and in the second configuration the valve member being retained in an open position;
a valve member retainer normally restrained in a first configuration and biassed for movement to a second configuration, the retainer being held in the first configuration while the valve member is in the first configuration and being releasable from said first configuration, by axial movement of the valve assembly relative to the valve body, to move the valve member to the open position and retain the valve member in the open position; and
a coupling arrangement including a retractable coupling member for initially coupling the valve assembly to the body to prevent relative movement therebetween, whereby retraction of the coupling member permits uncoupling, and thus permits release of the valve member retainer.
3 Assignments
0 Petitions
Accused Products
Abstract
A downhole check valve includes a body (32) defining a flow passage and a valve assembly (34, 42, 44) mounted in the body, the valve assembly including a valve member (34) movable from a first configuration to a second configuration. In the first configuration the valve member prevents flow in one direction through the passage, and in the second configuration the valve member is retained in an open position. A valve member retaining sleeve (48) is normally restrained in a first configuration and biassed for movement to a second configuration. The retainer is held in the first configuration while the valve member (34) is in the first configuration and is releasable from the first configuration to move the valve member to the open position and retain the valve member in the open position.
80 Citations
32 Claims
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1. A downhole valve including:
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a body defining a flow passage; a valve assembly mounted in the body, the valve assembly including a valve member being movable from a first configuration to a second configuration, in the first configuration the valve member preventing flow in at least one direction through the passage, and in the second configuration the valve member being retained in an open position; a valve member retainer normally restrained in a first configuration and biassed for movement to a second configuration, the retainer being held in the first configuration while the valve member is in the first configuration and being releasable from said first configuration, by axial movement of the valve assembly relative to the valve body, to move the valve member to the open position and retain the valve member in the open position; and a coupling arrangement including a retractable coupling member for initially coupling the valve assembly to the body to prevent relative movement therebetween, whereby retraction of the coupling member permits uncoupling, and thus permits release of the valve member retainer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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14. A downhole valve including:
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a body defining a flow passage; a valve assembly mounted in the body, the valve assembly including a valve member being movable from a first configuration to a second configuration, in the first configuration the valve member preventing flow in at least one direction through the passage, and in the second configuration the valve member being retained in an open position; a valve member retainer normally restrained in a first configuration and biassed for movement to a second configuration, the retainer being held in the first configuration while the valve member is in the first configuration and being releasable from said first configuration, by axial movement of the valve assembly relative to the valve body, to move the valve member to the open position and retain the valve member in the open position; and a biassing member for resisting said axial movement of the valve assembly relative to the body.
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15. A downhole valve including:
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a body defining a flow passage; a valve assembly mounted in the body, the valve assembly including (a) a valve member being movable from a first configuration to a second configuration, in the first configuration the valve member preventing flow in at least one direction through the passage, and in the second configuration the valve member being retained in an open position, (b) a portion for initially closing a port in the wall of the body, which port communicates with a control line linked to a packer or other fluid actuated downhole too, the valve assembly portion being movable to permit fluid flow through the port from the body passage;
a valve member retainer normally restrained in a first configuration and biassed for movement to a second configuration, the retainer being held in the first configuration while the valve member is in the first configuration and being releasable from said first configuration to move the valve member to the open position and retain the valve member in the open position. - View Dependent Claims (16)
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26. A downhole check valve comprising:
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a body defining a flow passage and; a valve assembly mounted in the body, the valve assembly including;
a primary valve member being movable from a first configuration to a second configuration, in the first configuration the valve member preventing flow in at least one direction through the passage, and in the second configuration the valve member being retained in an open position; and
a normally open secondary valve member configured to permit flow in said one direction through said primary valve member up to a predetermined rate and being closed by fluid forces in the event of the flow rate approaching said predetermined rate. - View Dependent Claims (27)
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28. Downhole apparatus including:
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a body; a member mounted on the body and being movable relative thereto; a coupling between the body and the member, in a first configuration the coupling preventing movement of the member relative to the body and in a second configuration the coupling permitting such movement; a coupling actuator for moving the coupling from the first to the second configuration; a sensor operatively associated with the coupling actuator and for activating the actuator on detection of a predetermined activation signal, wherein the member forms part of a valve, the valve being locked in a closed first configuration by the coupling and being movable to an open second configuration on re-configuring of the coupling. - View Dependent Claims (29, 30)
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31. Downhole apparatus including:
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a body; a member mounted on the body and being movable relative thereto; a coupling between the body and the member, in a first configuration the coupling preventing movement of the member relative to the body and in a second configuration the coupling permitting such movement; a coupling actuator for moving the coupling from the first to the second configuration; a sensor operatively associated with the coupling actuator and for activating the actuator on detection of a predetermined activation signal, wherein the member is movable by application of fluid pressure thereto.
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32. Downhole apparatus including:
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a body; a member mounted on the body and being movable relative thereto; a coupling between the body and the member, in a first configuration the coupling preventing movement of the member relative to the body and in a second configuration the coupling permitting such movement; a coupling actuator for moving the coupling from the first to the second configuration; a sensor operatively associated with the coupling actuator and for activating the actuator on detection of a predetermined activation signal, wherein the coupling actuator include an electric motor linked to a threaded shaft and threaded follower for movement therealong.
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Specification