Actuator switch for a downhole tool, tool and method
AssigneePackers Plus Energy Services Inc.
InventorsPatrick Glen Maguire, Fernando Olguin, Robert Joe Coon
Life of this patent
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Abstract
An actuator switch for actuation of a downhole tool, the actuator switch comprising: a rheomagnetic fluid having a state convertible between a liquid and a solid by the application of a magnetic field thereto, a change in the state of the rheomagnetic fluid acting to actuate the downhole tool; and a magnet installed in the tool and moveable relative to the rheomagnetic fluid to apply or remove the magnetic field to the rheomagnetic fluid, the magnet being moved by through tubing operations in an inner diameter of the downhole tool.
Claims28
An actuator switch for actuation of a downhole tool, the actuator switch comprising:
- a rheomagnetic fluid having a state convertible between a liquid and a solid by the application of a magnetic field thereto, a change in the state of the rheomagnetic fluid acting to actuate the downhole tool;
- and
- a magnet installed in the tool and moveable relative to the rheomagnetic fluid to apply or remove the magnetic field to the rheomagnetic fluid, the magnet being moved by through tubing operations in an inner diameter of the downhole tool.
A downhole tool for a wellbore operation, the downhole tool comprising:
- a wall defining an inner diameter and an outer surface;
- an operation mechanism for the downhole tool;
- and
- an actuator switch for actuating the operation mechanism, the actuator switch including:
- a chamber containing rheomagnetic fluid, the rheomagnetic fluid having a state convertible between a liquid and a solid by the application of a magnetic field thereto, a change in the state of the rheomagnetic fluid acting to actuate the downhole tool;
- and a magnet installed in the inner diameter and moveable relative to the rheomagnetic fluid to apply or remove the magnetic field to the rheomagnetic fluid, the magnet being moved by through tubing operations in the inner diameter of the downhole tool.
A method for actuating a wellbore tool in a wellbore, the method comprising:
- running a tubing string with a wellbore tool therein into a wellbore to a desired position in the wellbore;
- and
- manipulating a magnet by a through tubing operation to move the magnet relative to a switch mechanism for the downhole tool to cause a phase change in rheomagnetic fluid of the switch between a solid and a liquid to actuate the downhole tool.
Dependencies are inferred from the claim text.