Well tool having optical triggering device for controlling electrical power delivery
AssigneeHalliburton Energy Services, Inc.
InventorsNeal G. SKINNER, David P. SHARP
Life of this patent
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Abstract
A method of controlling electrical power delivery to a well tool can include transmitting trigger light via an optical waveguide to a circuit in a well, and the circuit delivering the electrical power to the well tool in response to the circuit receiving the trigger light. A circuit for supplying electrical power to at least one well tool can include a photodiode which receives light from an optical waveguide in a well, a voltage increaser which increases a voltage output by the photodiode, and an electrical energy storage device which receives electrical energy via the voltage increaser, whereby the electrical power can be supplied to the downhole well tool from the storage device.
Claims41
A method of controlling electrical power delivery to a well tool, the method comprising:
- transmitting trigger light via an optical waveguide to a circuit in a well;
- and
- the circuit delivering the electrical power to the well tool in response to the circuit receiving the trigger light.
A circuit for supplying electrical power to at least one downhole well tool, the circuit comprising:
- a photodiode which receives light from an optical waveguide in a well;
- a voltage increaser which increases a voltage output by the photodiode;
- and
- an electrical energy storage device which receives electrical energy via the voltage increaser, whereby the electrical power can be supplied to the downhole well tool from the storage device.
A method of optical distributed sensing in a well and supplying electrical power to at least one well tool, the method comprising:
- launching light into an optical waveguide in the well;
- in response to the launching, receiving indications of at least one parameter as distributed along the optical waveguide;
- and
- converting at least a portion of the light to electrical energy in the well, thereby supplying the electrical power to the well tool.
Dependencies are inferred from the claim text.