Method and apparatus for heating a wellbore
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United States of America Patent
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-
Apr 1, 2003
Grant Date -
N/A
app pub date -
Mar 8, 1999
filing date -
Mar 6, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An electrical heater is provided, the electrical heater being useful for heating soil around a wellbore, and the heater including: a plurality of electrically conductive heater elements within a wellbore, each element spaced from the other elements and located around the circumference of a wellbore; and an electrically insulating filer surrounding the elements within the wellbore; wherein a metal casing around the heater is not present.
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Family
International Classification(s)
Cited Art Landscape
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