Kinetic energy harvesting in a drill string
First Claim
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1. A harvester tool positioned in a wellbore for capturing energy in the wellbore, comprising:
- a rotor having a mass or a magnet, wherein the magnet is disposed eccentric to a center of the harvester tool, and wherein the rotor is rotatable around the center of the harvester tool, and further wherein the magnet or the mass is positioned on the rotor such that the rotor has an uneven mass distribution about a perimeter of the rotor causing rotation of the rotor to be eccentric rotation; and
a stator, wherein rotation of the rotor induces a voltage in the stator.
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Abstract
An apparatus and method for harvesting energy in a wellbore is disclosed. In one embodiment, a harvester tool positioned in a wellbore for capturing energy in the wellbore is disclosed. The harvester tool includes a rotor comprising a magnet. The magnet is disposed eccentric to a center of the harvester tool. In addition, the rotor is rotatable around the center of the harvester tool. The harvester tool also includes a stator. Rotation of the rotor induces a voltage in the stator.
32 Citations
20 Claims
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1. A harvester tool positioned in a wellbore for capturing energy in the wellbore, comprising:
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a rotor having a mass or a magnet, wherein the magnet is disposed eccentric to a center of the harvester tool, and wherein the rotor is rotatable around the center of the harvester tool, and further wherein the magnet or the mass is positioned on the rotor such that the rotor has an uneven mass distribution about a perimeter of the rotor causing rotation of the rotor to be eccentric rotation; and a stator, wherein rotation of the rotor induces a voltage in the stator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of capturing energy from a drill string in a wellbore, comprising:
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providing a harvester tool in the wellbore, wherein the harvester tool comprises a rotor and a stator, and wherein the rotor comprises a magnet disposed eccentric to a center of the harvester tool such that the rotor has an uneven mass distribution about a perimeter of the rotor whereby rotation of the rotor results in eccentric rotation; rotating the harvester tool in an eccentric motion in the wellbore rotating the magnet around the center of the harvester tool; and inducing a voltage in the stator, wherein rotation of the rotor induces the voltage in the stator. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification