Wellbore valve assembly
OwnerDavid Bell Conner, Amr Salama Mohamed Salem Goweilyinventors
Life of this patent
Estimating the term…
Abstract
A wellbore valve assembly including a valve member which is moveable relative to the valve seat, the valve assembly being receivable in a wellbore tubing having a first end and a second end, the valve member being moveable between an open position relative to the valve seat, and a position in which the valve member is seated against the valve seat, the valve assembly including a valve member biasing device for biasing the valve member towards the open position, the valve member being operable to close in the event of a force which exceeds a predetermined value being applied in either direction relative to the direction in which the valve member biasing device acts.
Claims31
A wellbore valve assembly including a valve member which is moveable relative to a valve seat, the valve assembly being receivable in a wellbore tubing having a first end and a second end, the valve member being moveable between an open position relative to the valve seat, and a position in which the valve member is seated against the valve seat, the valve assembly including a valve member biasing device for biasing the valve member in a first direction towards the open position,
- wherein the valve member is moveable against the biasing force, towards the seated position, in the event of a force which exceeds a first predetermined value being applied in generally the opposite direction to the biasing force applicable by the valve member biasing device, and
- wherein the valve member is moveable against the biasing force, towards the seated position, in the event of a force which exceeds a second predetermined value being applied in generally the same direction as the biasing force applicable by the valve member biasing device.
A wellbore valve assembly including a valve member which is moveable relative to a valve seat, the valve assembly being receivable in a wellbore tubing having a first end and a second end, the valve member being moveable between an open position relative to the valve seat, and a position in which the valve member is seated against the valve seat, the valve assembly including a valve member biasing device for biasing the valve member towards the open position,
- wherein the valve assembly includes an actuator which acts in a direction opposite to a biasing force applied by the valve member biasing device, to move the valve member towards the seated position, in the event of the pressure in the wellbore tubing exceeding a first predetermined value, and
- wherein the actuator is releasable in the event that the pressure in the wellbore tubing exceeds a second predetermined value, which is higher than the first predetermined value, such that the valve member is permitted to move towards the open position, under action of the valve member biasing device.
Dependencies are inferred from the claim text.