Downhole actuator apparatus having a chemically activated trigger
First Claim
1. A downhole actuator apparatus comprising:
- a body defining first and second chambers and a fluid path between first and second pressure regions;
a piston slidably disposed in the body and selectively moveable between first and second positions, in the first position, the piston blocking fluid communication between the first and second pressure regions and the first chamber and between the first pressure region and second pressure region, in the second position, the piston blocking fluid communication between the first and second pressure regions and the first chamber and allowing fluid communication between the first pressure region and second pressure region;
a barrier disposed in the body and selectively separating the first and second chambers;
a fluid disposed in the first chamber between the barrier and the piston; and
a control system at least partially disposed within the body, the control system operable to generate an output signal responsive to receipt of a predetermined input signal, the output signal operable to create a failure of the barrier such that at least a portion of the fluid flows from the first chamber to the second chamber and the piston moves from the first position to the second position, thereby allowing fluid communication between the first and second pressure regions.
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Accused Products
Abstract
A downhole actuator apparatus that selectively maintains a pressure differential between two pressure regions in a well. The apparatus includes a body defining first and second chambers. A piston is slidably disposed in the body and is selectively moveable between first and second positions. A barrier is disposed in the body to selectively separate the first and second chambers. A fluid is disposed in the first chamber between the barrier and the piston. A control system that is at least partially disposed within the body is operable to generate an output signal responsive to receipt of a predetermined input signal. The output signal is operable to create a failure of the barrier such that at least a portion of the fluid flows from the first chamber to the second chamber and the piston moves from the first position to the second position.
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Citations
20 Claims
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1. A downhole actuator apparatus comprising:
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a body defining first and second chambers and a fluid path between first and second pressure regions; a piston slidably disposed in the body and selectively moveable between first and second positions, in the first position, the piston blocking fluid communication between the first and second pressure regions and the first chamber and between the first pressure region and second pressure region, in the second position, the piston blocking fluid communication between the first and second pressure regions and the first chamber and allowing fluid communication between the first pressure region and second pressure region; a barrier disposed in the body and selectively separating the first and second chambers; a fluid disposed in the first chamber between the barrier and the piston; and a control system at least partially disposed within the body, the control system operable to generate an output signal responsive to receipt of a predetermined input signal, the output signal operable to create a failure of the barrier such that at least a portion of the fluid flows from the first chamber to the second chamber and the piston moves from the first position to the second position, thereby allowing fluid communication between the first and second pressure regions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A downhole actuator apparatus comprising:
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a body defining first and second chambers and a fluid path between first and second pressure regions; a piston slidably disposed in the body and selectively moveable between first and second positions, in the first position, the piston blocking fluid communication between the first and second pressure regions and the first chamber and between the first pressure region and second pressure region, in the second position, the piston blocking fluid communication between the first and second pressure regions and the first chamber and allowing fluid communication between the first pressure region and second pressure region; a barrier disposed in the body and selectively separating the first and second chambers; a fluid disposed in the first chamber between the barrier and the piston, the fluid operable to selectively retain the piston in the first position; and a control system at least partially disposed within the body, the control system including a signal detector, a control circuit and a trigger, wherein upon receipt of a predetermined input signal by the signal detector, the control circuit activates the trigger to create a failure of the barrier such that at least a portion of the fluid flows from the first chamber to the second chamber and the piston moves from the first position to the second position, thereby allowing fluid communication between the two pressure regions. - View Dependent Claims (17, 18, 19, 20)
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Specification