Method and apparatus for heating viscous fluids in a well

Details Method and apparatus for heating viscous fluids in a well Method and apparatus for heating viscous fluids in a well

E - Fixed Constructions

21

B

E21B 43/24 (2006.01) E21B 36/04 (2006.01)

Patent

CA 2254221

A system for heating viscous fluids in a wellbore includes a submergible pumping system comprising a pump and submergible electric motor. A heating unit is coupled to the pumping system and is supplied with electrical energy through a cable used to supply electrical energy to the motor. The heating unit may include a direct or alternating current heater and protective circuitry. The heating unit may be supplied with electrical energy through the motor stator windings or via a jumper arranged in parallel with the stator windings. Switches may be included in the heating unit and in a motor base for energizing the motor and the heating unit based upon sensed temperatures of the viscous fluids surrounding the pumping system.

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