Cooling of downhole electric pump motors

Details Cooling of downhole electric pump motors Cooling of downhole electric pump motors

1976-09-13

1978-11-21

Croyle, Carlton R.

Pumps

Motor driven

With means to prevent heat transfer between pump and motor

310 64, 310 87, F04B 3906

Patent

active

041264061

ABSTRACT:
Efficient downhole cooling of the electric pump motor, motor protector, and thrust bearing of a submergible pump assembly in a high temperature environment is accomplished without significant modification of the pump assembly itself. Coolant flows through an insulated shroud as a high velocity annular fluid sheet surrounding the components to be cooled. In a closed loop system, coolant from a heat exchanger is supplied to the shroud via insulated supply tubing, which contains a cable for energizing the motor, is injected into the shroud by a coolant discharge head from which the pump assembly is suspended, and returns to the heat exchanger via insulated return tubing. The walls of the shroud and tubing include expansion element which accommodate the difference between interior and exterior temperatures.

REFERENCES:
patent: 2283118 (1942-05-01), Arutunoff
patent: 2764943 (1956-10-01), Peters
patent: 2776385 (1957-01-01), Modrey
patent: 2783400 (1957-02-01), Arutunoff
patent: 2829286 (1958-04-01), Britz
patent: 3388724 (1968-06-01), Mowell et al.
patent: 3468258 (1969-09-01), Arutunoff
patent: 3672795 (1972-06-01), Arutunoff et al.

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