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US 9,752,385 B2Granted
Pipe in pipe BHA electric drive motor
AssigneeHalliburton Energy Services, Inc.
InventorsRichard Thomas Hay, Keith E. Holtzman
Life of this patent
Estimating the term…
Abstract
A pipe in pipe electric motor assembly comprising: a drilling string comprising an inner pipe and an outer pipe and an electric motor; wherein the electric motor is provided with power supplied by the inner pipe and the outer pipe acting at least as conductors and associated methods.
Claims20
A pipe in pipe electric motor assembly comprising:
- a drilling string comprising an inner pipe and an outer pipe, wherein the inner pipe and the outer pipe transmit a direct current power along the drilling string;
- an electric motor controller electrically coupled to the inner pipe and the outer pipe, wherein the electric motor controller is positioned downhole, wherein the electric motor controller converts the direct current power to an alternating current;
- an electric motor coupled to the electric motor controller, wherein the electric motor is provided with the alternating current of the at least one phase by the electric motor controller;
- and
- wherein the electric motor controller alters any two phases of the alternating current to change the direction of rotation of a rotor of the electric motor.
2 more elements
A method of providing power to an electric motor comprising:
- providing a pipe in pipe electric motor assembly comprising:
- a drilling string comprising an inner pipe and an outer pipe, wherein the inner pipe and the outer pipe transmit a direct current power along the drilling string;
- an electric motor controller electrically coupled to the inner pipe and the outer pipe, wherein the electric motor controller is positioned downhole, wherein the electric motor controller converts the direct current power to an alternating current, and
- an electric motor coupled to the electric motor controller;
- and
- providing the alternating current of the at least one phase to the electric motor by the electric motor controller, wherein the electric motor controller alters any two phases of the alternating current to change the direction of rotation of a rotor of the electric motor.
3 more elements
A method of drilling a wellbore in a subterranean formation comprising:
- providing a pipe in pipe electric motor assembly comprising:
- a drilling string comprising an inner pipe and an outer pipe, wherein the inner pipe and the outer pipe transmit a direct current power along the drilling string;
- an electric motor controller electrically coupled to the inner pipe and the outer pipe, wherein the electric motor controller is positioned downhole, wherein the electric motor controller converts the direct current power to an alternating current;
- an electric motor coupled to the electric motor controller;
- and
- a drill bit, wherein the electric motor is provided with the alternating current by the electric motor controller;
- providing the alternating current of the at least one phase to the electric motor to generate rotational power, wherein the electric motor controller alters any two phases of the alternating current to change the direction of rotation of a rotor of the electric motor;
- and
- applying the rotational power to the drill bit.
6 more elements
Dependencies are inferred from the claim text.