System and method for providing electrical power downhole
First Claim
1. A system for transmitting power between components of a downhole drill string, the system comprising:
- a power source providing a first alternating current having a first frequency;
a first rectifier to convert the first alternating current to direct current;
an inverter to convert the direct current to a second alternating current having a second frequency different from the first frequency; and
a first inductive coupler to convert the second alternating current to an alternating magnetic flux for transmission across a tool joint of a downhole drill string.
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Accused Products
Abstract
A system for transmitting power to components of a downhole drill string is disclosed in one embodiment of the invention as including a power source providing an alternating current at a first frequency. A rectifier is provided to convert the alternating current to direct current. An inverter converts the direct current to an alternating current at a second frequency, different from the first frequency, and more efficient for power transmission. An inductive coupler converts the alternating current at the second frequency to an alternating magnetic flux for transmission across a tool joint of a downhole drill string. The magnetic flux may be detected by another inductive coupler, magnetically coupled to the first inductive coupler, to convert the alternating magnetic flux back to an alternating current at the second frequency.
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Citations
18 Claims
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1. A system for transmitting power between components of a downhole drill string, the system comprising:
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a power source providing a first alternating current having a first frequency; a first rectifier to convert the first alternating current to direct current; an inverter to convert the direct current to a second alternating current having a second frequency different from the first frequency; and a first inductive coupler to convert the second alternating current to an alternating magnetic flux for transmission across a tool joint of a downhole drill string. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for transmitting power between components of a downhole drill string, the method comprising:
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generating a first alternating current having a first frequency; converting the first alternating current to direct current; converting the direct current to a second alternating current having a second frequency different from the first frequency; and converting the second alternating current to an alternating magnetic flux for transmission across a tool joint of a downhole drill string. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification