Valve assembly
AssigneeQuartech Engineering Limited
InventorClive John French
Life of this patent
Estimating the term…
Abstract
A downhole valve assembly (10) comprises a tubular body (12), and a valve comprising a valve member (18) and a fluid actuated valve control mechanism (14) adapted to be selectively actuated to move the valve member between an open and a closed configuration, for selectively allowing fluid flow through the body (12). A first hydraulic control conduit (41) is in fluid communication with the valve control mechanism (14) for permitting actuation Of the control mechanism to move the valve member (18) to the open configuration, by application of a first control fluid. A second hydraulic control conduit (41) is in fluid communication with the valve control mechanism (14) to move the valve member (18) to the closed configuration, by application of a second control fluid.
Claims21
A valve assembly for location in a borehole of a well, the assembly comprising:
- a hollow elongate member for location in the borehole;
- a valve comprising a valve member and a fluid actuated valve control mechanism adapted to be selectively actuated to move the valve member between an open configuration allowing fluid flow through the hollow member and a closed configuration where the valve member is restrained by the valve control mechanism to prevent fluid flow through the hollow member in both a first axial direction and a second, opposite axial direction;
- a first hydraulic control conduit in fluid communication with the valve control mechanism for permitting actuation of the control mechanism to move the valve member to the open configuration, by application of a first control fluid;
- and
- a second hydraulic control conduit in fluid communication with the valve control mechanism to move the valve member to the closed configuration, by application of a second control fluid.
A valve assembly for location in a borehole of a well, the assembly comprising:
- a hollow elongate member for location in the borehole;
- and
- a valve comprising a valve member and a fluid actuated valve control mechanism adapted to be selectively actuated to allow repeated movement of the valve member between an open configuration allowing fluid flow through the hollow member, and a closed configuration where the valve member is restrained by the valve control mechanism to prevent fluid flow through the hollow member in both a first axial direction and a second, opposite axial direction, the valve control mechanism comprising a plurality of fluid actuated movable elements adapted to move in a predetermined sequence in response to exposure to a common fluid pressure.
A valve assembly for location in a borehole of a well, the assembly comprising:
- a hollow elongate member for location in the borehole;
- a valve comprising a valve member and a fluid actuated valve control mechanism adapted to be selectively actuated to allow repeated movement of the valve member between an open and a closed configuration;
- and
- a bypass vent being selectively openable to permit an alternative flow path around the valve member on closing of the valve member to provide a fluid path around the valve member.
A valve assembly for location in a borehole of a well, the assembly comprising:
- a hollow elongate member for location in the borehole;
- a valve comprising a valve member and a fluid actuated valve control mechanism adapted to be selectively actuated to move the valve member between an open and a closed configuration, for selectively allowing fluid flow through the hollow member;
- a first hydraulic control conduit in fluid communication with the valve control mechanism for permitting actuation of the control mechanism to move the valve member to the open configuration, by application of a first control fluid;
- a second hydraulic control conduit in fluid communication with the valve control mechanism to move the valve member to the closed configuration, by application of a second control fluid;
- and
- a bypass vent which is selectively openable to provide an alternative fluid flow path around the valve member.
A valve assembly for location in a borehole of a well, the assembly comprising:
- a hollow elongate member for location in the borehole;
- a valve comprising a valve member and a fluid actuated valve control mechanism adapted to be selectively actuated to move the valve member between an open and a closed configuration, for selectively allowing fluid flow through the hollow member;
- a first hydraulic control conduit in fluid communication with the valve control mechanism for permitting actuation of the control mechanism to move the valve member to the open configuration, by application of a first control fluid;
- and
- a second hydraulic control conduit in fluid communication with the valve control mechanism to move the valve member to the closed configuration, by application of a second control fluid;
- and
- wherein the valve control mechanism comprises a plurality of independently movable fluid actuated elements adapted to move in a predetermined sequence in response to exposure to a common fluid pressure of the first and second control fluids.
A valve assembly for location in a borehole of a well, the assembly comprising:
- a hollow elongate member for location in the borehole;
- and
- a valve comprising a valve member and a fluid actuated valve control mechanism adapted to be selectively actuated to move the valve member between an open and a closed configuration, for selectively allowing fluid flow through the hollow member, the valve control mechanism comprising a plurality of fluid actuated movable elements adapted to move in a predetermined sequence in response to exposure to a common fluid pressure, the elements defining different piston areas, such that the pressure forces experienced by the elements are different.
Dependencies are inferred from the claim text.