Drill bit with electrical power generator
First Claim
Patent Images
1. A drill bit, comprising:
- a bit body defining at least one pocket;
a support arm attachable to the bit body at the at least one pocket and including a coupling that extends from the support arm;
a roller cone defining a cavity for receiving the coupling to rotatably mount the roller cone on the coupling; and
a direct drive electrical power generator positioned within the coupling and operatively coupled to the roller cone such that rotation of the roller cone correspondingly rotates a portion of the direct drive electrical power generator to generate electrical power, the direct drive electrical power generator comprising;
a stator body coupled to the bit body, the stator body housing a plurality of coil windings; and
a rotor shaft operatively coupled to the roller cone, wherein the stator body axially retains the rotor shaft within the stator body.
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Abstract
An example drill bit includes a bit body defining at least one pocket, and a support arm attachable to the bit body at the at least one pocket and including a coupling that extends from the support arm. A roller cone defines a cavity for receiving the coupling to rotatably mount the roller cone on the coupling. A direct drive electrical power generator is positioned within the coupling and is operatively coupled to the roller cone such that rotation of the roller cone correspondingly rotates a portion of the direct drive electrical power generator to generate electrical power.
24 Citations
22 Claims
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1. A drill bit, comprising:
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a bit body defining at least one pocket; a support arm attachable to the bit body at the at least one pocket and including a coupling that extends from the support arm; a roller cone defining a cavity for receiving the coupling to rotatably mount the roller cone on the coupling; and a direct drive electrical power generator positioned within the coupling and operatively coupled to the roller cone such that rotation of the roller cone correspondingly rotates a portion of the direct drive electrical power generator to generate electrical power, the direct drive electrical power generator comprising; a stator body coupled to the bit body, the stator body housing a plurality of coil windings; and a rotor shaft operatively coupled to the roller cone, wherein the stator body axially retains the rotor shaft within the stator body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method, comprising:
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introducing a drill string into a wellbore, the drill string having a drill bit positioned at a distal end thereof and the drill bit including a bit body defining at least one pocket, a support arm attachable to the bit body at the at least one pocket and including a coupling that extends from the support arm, the drill bit further including a roller cone that defines a cavity for receiving the coupling to rotatably mount the roller cone on the coupling; rotating the drill string within the wellbore and thereby rotating the roller cone on the coupling; rotating a portion of a direct drive electrical power generator positioned within the coupling as the roller cone rotates, the portion of the direct drive electrical power generator being operatively coupled to the roller cone, the direct drive electrical power generator comprising; a stator body coupled to the bit body, the stator body housing a plurality of coil windings; and a rotor shaft operatively coupled to the roller cone, wherein the stator body axially retains the rotor shaft within the stator body; and generating electrical power with the direct drive electrical power generator as the portion of the direct drive electrical power generator rotates. - View Dependent Claims (14, 15)
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16. A rotary cone drill bit, comprising:
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a bit body defining at least one pocket; a cutter cone assembly attachable to the bit body at the at least one pocket and including a roller cone defining a cavity; and a magnetic flux multiplier assembly positioned within the cutter cone assembly and operatively coupled to a roller cone such that rotation of the roller cone correspondingly rotates a rotor shaft of the magnetic flux multiplier assembly to generate electrical power, the magnetic flux multiplier assembly comprising; a stator body coupled to the bit body, the stator body housing a plurality of coil windings, wherein the stator body axially retains the rotor shaft within the stator body, wherein the magnetic flux multiplier assembly includes a first magnetic ring, a second magnetic ring, an interference ring that interposes the first and second magnetic rings, and the plurality of coil windings are communicably coupled to one of the first and second magnetic rings, and wherein the first and second magnetic rings and the interference ring are concentrically-located and, of the first and second magnetic rings and the interference ring, one is a rotating member operatively coupled to the roller cone for rotation therewith, one is a floating member, and one is a stationary member. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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Specification