Apparatus and method for heating subterranean formations using fuel cells
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United States of America Patent
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Feb 3, 2004
Grant Date -
N/A
app pub date -
Jan 15, 2002
filing date -
Jan 15, 2002
priority date (Note) -
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Abstract
A fuel cell based subterranean heater for mineral extraction, in situ decontamination, or other applications. The fuel cells are preferably stacked within a casing which is then inserted into a hole bored, or otherwise formed, into the formation to be heated. Conduits within the casing, and preferably formed by adjacent, aligned holes formed through the plates of the individual fuel cells supply fuel and air and extract exhaust gases. An optional manifold is used to span the overburden without applying heat to it directly. The manifold may also function as a heat exchanger between incoming and exhaust gases. Preferably the fuel cell is fueled by gases produced by the formation and also generates electricity which is available for use or export.
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