Patent ID: 11913464
Assignee: SAUDI ARABIAN OIL COMPANY
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  E | IPC E  F

Claim 6:
7. A method comprising:
sensing, by directly contacting a dielectric oil lubricating an electric motor of an electric submersible pump assembly with a receiver coil of a sensor, a change in a self-inductance of the receiver coil;
transmitting a signal including a value representing the change in the self-inductance of the receiver coil;
receiving the signal including the value from the sensor at a controller operatively coupled to the electric motor and the sensor;
comparing the value of the change in the self-inductance of the receiver coil to a threshold change value of the self-inductance of the receiver coil;
based on a result of the comparison, determining when the value of the change of the self-inductance of the receiver coil of the dielectric oil is greater than the threshold change value; and
responsive to determining that the value representing the change in the self-inductance of the receiver coil is greater than the threshold change value indicating a presence of contaminated dielectric oil, flowing a clean dielectric oil to the electric motor.