Supplying power to underwater devices
First Claim
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1. A method of supplying electrical power to at least one device at a tree of an underwater fluid extraction well, the method comprising:
- using magnetic resonance coupling for wirelessly transmitting power from a supply to the at least one device, wherein there is a plurality of the at least one device, each device being powered via a respective receiver circuit which can be coupled by magnetic resonance coupling with a transmitter circuit of said supply;
transmitting a code unique to at least one of the plurality of devices by wireless communication to the receiver circuit of the device, wherein said code is generated according to a demand from control circuitry in a subsea electronics module associated with the tree; and
detecting the code at the receiver circuit of the device to cause power to be supplied to the device by magnetic resonance coupling;
wherein the at least one device is a directional control valve that is powered according to the demand on a line from directional control valve control circuitry of the subsea electronics module.
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Abstract
A method of supplying electrical power to at least one device at a tree of an underwater fluid extraction well is disclosed. The method comprises using magnetic resonance coupling for wirelessly transmitting power from a supply to each device.
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Citations
16 Claims
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1. A method of supplying electrical power to at least one device at a tree of an underwater fluid extraction well, the method comprising:
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using magnetic resonance coupling for wirelessly transmitting power from a supply to the at least one device, wherein there is a plurality of the at least one device, each device being powered via a respective receiver circuit which can be coupled by magnetic resonance coupling with a transmitter circuit of said supply; transmitting a code unique to at least one of the plurality of devices by wireless communication to the receiver circuit of the device, wherein said code is generated according to a demand from control circuitry in a subsea electronics module associated with the tree; and detecting the code at the receiver circuit of the device to cause power to be supplied to the device by magnetic resonance coupling; wherein the at least one device is a directional control valve that is powered according to the demand on a line from directional control valve control circuitry of the subsea electronics module. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus for supplying electrical power to at least one device at a tree of an underwater fluid extraction well, the apparatus comprising:
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circuitry configured to use magnetic resonance coupling for wirelessly transmitting power from a supply to the at least one device, wherein there is a plurality of the at least one device, each device being powered via a respective receiver circuit which can be coupled by magnetic resonance coupling with a transmitter circuit of said supply; wherein a code unique to at least one of the plurality of devices is transmitted by wireless communication to the receiver circuit of the device, detection of the code at the receiver circuit of the device causing power to be supplied to the device by magnetic resonance coupling, and wherein said code is generated according to a demand from control circuitry in a subsea electronics module associated with the tree; and wherein the at least one device is a directional control valve that is powered according to the demand on a line from directional control valve control circuitry of the subsea electronics module. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification