Oil well heater cable
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United States of America Patent
Stats
-
Jul 21, 1998
Grant Date -
N/A
app pub date -
Oct 9, 1996
filing date -
Oct 9, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A heater cable is strapped alongside tubing in a well to heat the production fluids flowing through the tubing. The heater cable has three copper conductors surrounded by a thin electrical insulation layer. An extrusion of lead forms a protective layer over the insulation layers. The lead sheaths have flat sides which abut each other to increase heat transfer. A metal armor is wrapped around the lead sheaths of the three conductors in metal-to-metal contact. Three phase power is supplied to the conductors, causing heat to be generated which transmits through the lead sheaths and armor to the tubing.
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