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Battery switch for downhole tools

United States Patent

February 23, 2010
View the Complete Patent at the US Patent & Trademark Office
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.
Boling; Brian E. (Sugar Land, TX)
Schlumberger Technology Corporation (Sugar Land, TX)
10/ 905,050
December 13, 2004
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT This invention was made with Government support under Cooperative Agreement No. DE-FC26-03NT41835 awarded by the department of Energy (DOE). The Government has certain rights in this invention.