Twinaxial linear induction antenna array for increased heavy oil recovery
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United States of America Patent
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May 21, 2013
Grant Date -
May 24, 2012
app pub date -
Nov 19, 2010
filing date -
Nov 19, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
A radio frequency applicator and method for heating a hydrocarbon formation is disclosed. An aspect of at least one embodiment disclosed is a linear radio frequency applicator. It includes a transmission line and a current return path that is insulated from the transmission line. At least one conductive sleeve is positioned around the transmission line and the current return path. The transmission line and the current return path are electrically connected to the conductive sleeve. A radio frequency source is configured to apply a signal to the transmission line. When the linear applicator is operated, a circular magnetic field forms, which creates eddy current in the formation causing heavy hydrocarbons to flow. The heat is reliable as liquid water contact is not required. The applicator may operate in permafrost regions and without caprock.
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