Electric resistance heating devices – Heating devices – Borehole type
Reexamination Certificate
2011-03-22
2011-03-22
Campbell, Thor S (Department: 3742)
Electric resistance heating devices
Heating devices
Borehole type
C166S245000
Reexamination Certificate
active
07912358
ABSTRACT:
Systems, methods, and heaters for treating a subsurface formation are described herein. At least one system for providing power to one or more subsurface heaters is described herein. The system may include an intermittent power source; a transformer coupled to the intermittent power source, and a tap controller coupled to the transformer. The transformer may be configured to transform power from the intermittent power source to power with appropriate operating parameters for the heaters. The tap controller may be configured to monitor and control the transformer so that a constant voltage is provided to the heaters from the transformer regardless of the load of the heaters and the power output provided by the intermittent power source.
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pate
Goodwin Charles R.
Richard, Jr. James
Stone, Jr. Francis Marion
Campbell Thor S
Shell Oil Company
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