Wells – Processes – Heating – cooling or insulating
Reexamination Certificate
2006-09-29
2010-02-23
Stephenson, Daniel P (Department: 3676)
Wells
Processes
Heating, cooling or insulating
C166S060000
Reexamination Certificate
active
07665524
ABSTRACT:
Apparatus for efficient heating of subterranean earth includes a well-casing that has an inner wall and an outer wall. A heater is disposed within the inner wall and is operable within a preselected operating temperature range. A heat transfer metal is disposed within the outer wall and without the inner wall, and is characterized by a melting point temperature lower than the preselected operating temperature range and a boiling point temperature higher than the preselected operating temperature range.
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DeVault Robert C.
Wesolowski David J.
Marasco Joseph A.
Stephenson Daniel P
UT-Battelle LLC
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