Battery switch for downhole tools
First Claim
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1. An electrical circuit for a downhole tool, comprising:
- a battery;
a load electrically connected to the battery, wherein the load comprises a component of the downhole tool; and
at least one switch electrically connected to the battery and the load,wherein the at least one switch is configured to close the electrical circuit to the load when a temperature indicative of a battery temperature exceeds a selected temperature.
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Abstract
An electrical circuit for a downhole tool may include a battery, a load electrically connected to the battery, and at least one switch electrically connected in series with the battery and to the load. The at least one switch may be configured to close when a tool temperature exceeds a selected temperature.
44 Citations
42 Claims
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1. An electrical circuit for a downhole tool, comprising:
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a battery; a load electrically connected to the battery, wherein the load comprises a component of the downhole tool; and at least one switch electrically connected to the battery and the load, wherein the at least one switch is configured to close the electrical circuit to the load when a temperature indicative of a battery temperature exceeds a selected temperature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A method for preventing power loss in a high-temperature battery in a downhole tool positioned in a wellbore penetrating a subsurface formation, comprising:
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measuring a temperature indicative of the battery temperature; and closing at least one switch in a high-temperature battery circuit thereby coupling the battery to a load when the temperature indicative of the battery temperature exceeds a selected temperature, wherein the load comprises a component of the downhole tool. - View Dependent Claims (29, 30, 31, 32)
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33. A downhole tool, comprising:
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a high-temperature battery; a tool component electrically connected to the battery; and at least one switch electrically connected between the battery and the tool component, wherein the at least one switch is configured to close a circuit to the tool component when a temperature indicative of a battery temperature exceeds a selected temperature. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41, 42)
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Specification