Larry Verl Dalrymple - Claremore OK Harold Dean Eastin - Claremore OK Thomson Hall Wallace - Claremore OK
Assignee:
Baker Hughes Incorporated
International Classification:
E21B 3604 E21B 4324
US Classification:
166 60
Abstract:
A power cable for an ESP is used also for heating well bores in cold climates. An electrical switch is located within a wellbore at a selected location in the power cable. The electrical switch is provided to selectively short out the conductors within the power cable, thereby allowing the power cable above the switch to be used as a resistive heating element to thaw the wellbore. While the switch is open, power supplied to power cable drives ESP in a normal manner.
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