Emergency disconnect isolation valve
First Claim
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1. A system for disconnection in a drilling operation, comprising:
- a body having an interior volume and an outer surface, the body having a seal positioned in the interior volume and a valve positioned in the seal, the valve is rotatable between an open position and a closed position, the body having an actuator disposed on the outer surface of the body, and the actuator is interconnected the valve;
a shear sub at least partially covering the outer surface of the body, the shear sub having a slot and the actuator of the body is positionable in the slot; and
a shearing mechanism selectively interconnects the shear sub to the body and selectively disconnects the shear sub from the body when the shear sub is subjected to a predetermined shear force, wherein when the shear sub selectively disconnects from the body, the shear sub rotates the actuator as the actuator is removed from the slot of the shear sub to rotate the valve from the open position to the closed position.
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Abstract
An isolation valve system, method, and apparatus are provided that can isolate a wellbore and prevent fluids from exiting the well and prevent seawater from entering the well. The system can be a two-part design in some embodiments where a shear sub is selectively interconnected to a body via shearing screws. A sufficient force on the shear sub destroys the shearing screws and the shear sub is removed from the body. This movement rotates an actuator on the body, which in turn rotates a valve in the body to provide the isolating function during routine operation of a wellbore or during an emergency.
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Citations
9 Claims
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1. A system for disconnection in a drilling operation, comprising:
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a body having an interior volume and an outer surface, the body having a seal positioned in the interior volume and a valve positioned in the seal, the valve is rotatable between an open position and a closed position, the body having an actuator disposed on the outer surface of the body, and the actuator is interconnected the valve; a shear sub at least partially covering the outer surface of the body, the shear sub having a slot and the actuator of the body is positionable in the slot; and a shearing mechanism selectively interconnects the shear sub to the body and selectively disconnects the shear sub from the body when the shear sub is subjected to a predetermined shear force, wherein when the shear sub selectively disconnects from the body, the shear sub rotates the actuator as the actuator is removed from the slot of the shear sub to rotate the valve from the open position to the closed position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification