Low resistance electrical heater

Details Low resistance electrical heater Low resistance electrical heater

H - Electricity

05

B

H05B 3/12 (2006.01) E21B 36/04 (2006.01)

Patent

CA 2055548

A subterranean electrical heater comprising an electrical heating cable (9, 10) arranged in a partly cased well borehole (1) having a heating core comprising about 6 percent by weight of nickel and about 94 percent by weight of copper, a mineral insulation surrounding the heating core, a sheath surrounding the mineral insulation, cement (23) securing the heating cable (9, 10) in the well borehole (1) in the formation zone (22) to be heated; and a means (1, 2) to supply electrical power through the heating cable (9, 10).

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