In situ conversion process systems utilizing wellbores in at least two regions of a formation
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United States of America Patent
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Sep 27, 2011
Grant Date -
Jun 14, 2007
app pub date -
Apr 21, 2006
filing date -
Apr 22, 2005
priority date (Note) -
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Abstract
A system for heating a subsurface formation is described. The system includes a plurality of elongated heaters located in a plurality of openings in the formation. At least two of the heaters are substantially parallel to each other for at least a portion of the lengths of the heaters. At least two of the heaters have first end portions in a first region of the formation and second end portions in a second region of the formation. A source of time-varying current is configured to apply time-varying current to at least two of the heaters. The first end portions of at least two heaters are configured to have substantially the same voltage applied to them. The second portions of at least two heaters are configured to have substantially the same voltage applied to them.
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