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

1997-11-17

1999-12-28

Schoeppel, Roger

Wells

Processes

Heating, cooling or insulating

166 60, 166 62, 166 664, 166369, E21B 3604

Patent

active

06006837&

ABSTRACT:
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.

REFERENCES:
patent: 2666487 (1954-01-01), Bowman
patent: 4621689 (1986-11-01), Brookbank
patent: 5070940 (1991-12-01), Conner et al.
patent: 5285846 (1994-02-01), Mohn

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