Heating systems for heating subsurface formations
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United States of America Patent
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Apr 26, 2011
Grant Date -
Apr 16, 2009
app pub date -
Apr 18, 2008
filing date -
Apr 20, 2007
priority date (Note) -
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Abstract
Methods and systems for heating a subsurface formation are described herein. A heating system for a subsurface formation includes a sealed conduit positioned in an opening in the formation and a heat source. The sealed conduit includes a heat transfer fluid. The heat source provides heat to a portion of the sealed conduit to change phase of the heat transfer fluid from a liquid to a vapor. The vapor in the sealed conduit rises in the sealed conduit, condenses to transfer heat to the formation and returns to the conduit portion as a liquid.
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