ELECTRICALLY ISOLATING INSULATED CONDUCTOR HEATER
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United States of America Patent
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Issued Date -
May 14, 2009
app pub date -
Apr 18, 2008
filing date -
Apr 20, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A heating system for a subsurface formation includes an electrical conductor and an insulation layer at least partially surrounding the electrical conductor. A jacket that includes ferromagnetic material at least partially surrounds the insulation layer. The outside surface of the jacket is configured to be at little or no electric potential while the electrical conductor is conducting electricity and while the jacket is at temperatures below the Curie temperature of the ferromagnetic material.
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