High voltage temperature limited heaters
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United States of America Patent
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-
Aug 7, 2012
Grant Date -
Jul 29, 2004
app pub date -
Oct 24, 2003
filing date -
Oct 24, 2002
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A heater system may include an alternating current supply and an electrical conductor. An alternating current may be applied to one or more electrical conductors at a voltage above about 200 volts. The electrical conductors may be located in a formation. The electrical conductors may provide an electrically resistive heat output upon application of the alternating electrical current. At least one of the electrical conductors may include an electrically resistive ferromagnetic material. An electrical conductor may provide a reduced amount of heat above or near a selected temperature. Heat may be allowed to transfer from an electrical conductor to a part of the formation.
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