Lift fluid driven downhole electrical generator and method for use of the same
First Claim
1. A method for controlling the electrical output of a lift fluid driven downhole electrical generator comprising the steps of:
- positioning the downhole electrical generator within a tubing string;
injecting a lift fluid down an annulus surrounding the tubing string;
providing a fluid communication path through the downhole electrical generator and communicating lift fluid therethrough;
rotating a rotor and an electromagnetic assembly such that electricity is generated in response to the flow of lift fluid through the fluid communication path;
sensing the generated electricity to determine the electrical output of the downhole electrical generator; and
adjusting the flowrate of lift fluid through the fluid communication path, thereby controlling the electrical output of the downhole generator.
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0 Petitions
Accused Products
Abstract
A lift fluid driven downhole electrical generator and method for generating and controlling the electrical output from the electrical generator is disclosed. The electrical generator comprises a housing having a lift fluid port in a sidewall portion thereof for allowing the flow of lift fluids therethrough. A rotor is rotatably disposed within the housing. The rotor converts lift fluid pressure to rotary motion when the lift fluid travels through the lift fluid port and impinges the rotor. The electrical generator also includes an electromagnetic assembly having a first portion that is rotatable with the rotor and a second portion that is stationary with the housing. The electromagnetic assembly converts the rotary motion to electricity as the first portion of an electromagnetic assembly rotates relative to the second portion of the electromagnetic assembly.
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Citations
47 Claims
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1. A method for controlling the electrical output of a lift fluid driven downhole electrical generator comprising the steps of:
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positioning the downhole electrical generator within a tubing string;
injecting a lift fluid down an annulus surrounding the tubing string;
providing a fluid communication path through the downhole electrical generator and communicating lift fluid therethrough;
rotating a rotor and an electromagnetic assembly such that electricity is generated in response to the flow of lift fluid through the fluid communication path;
sensing the generated electricity to determine the electrical output of the downhole electrical generator; and
adjusting the flowrate of lift fluid through the fluid communication path, thereby controlling the electrical output of the downhole generator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for generating electricity downhole with a lift fluid driven downhole electrical generator comprising the steps of:
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positioning the downhole electrical generator within a tubing string;
providing fluid pressure by injecting a lift fluid down an annulus surrounding the tubing string;
converting the fluid pressure to rotary motion by impinging the lift fluid against a rotor; and
converting the rotary motion to electricity by rotating a first portion of an electromagnetic assembly relative to a second portion of the electromagnetic assembly. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A lift fluid driven downhole electrical generator comprising:
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a housing having a lift fluid port in a sidewall portion thereof for allowing the flow of lift fluid therethrough;
a rotor rotatably disposed within the housing for converting lift fluid pressure to rotary motion when the lift fluid passes through the lift fluid port and impinges the rotor; and
an electromagnetic assembly having a first portion that is rotatable with the rotor and a second portion that is stationary with the housing, the electromagnetic assembly converting the rotary motion to electricity as the first portion of the electromagnetic assembly rotates relative to the second portion of the electromagnetic assembly. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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38. A method for generating electricity downhole with a lift fluid driven downhole electrical generator comprising the steps of:
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positioning the downhole electrical generator within a tubing string;
providing fluid pressure by injecting a lift fluid down an annulus surrounding the tubing string; and
converting the fluid pressure to electricity. - View Dependent Claims (39, 40, 41, 42, 43, 44, 45, 46, 47)
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Specification