Patent ID: 9476425
Filing Date: 2016-10-25
CPC Classification: E21B,F04D,H02K

Claim Text:
1. An apparatus to determine a direction of rotation of a motor and pump of an electrical submersible pump, comprising: an electrical submersible pump assembly including a motor, a pump, a housing, and at least one sensor positioned to measure a rotational rate; and a processing system being configured to determine a direction of rotation of the pump, the motor, or both the pump and the motor responsive to a signal output from the at least one sensor to thereby determine if the pump, the motor, or both the pump and the motor of the electrical submersible pump assembly is rotating in an intended direction, wherein the processing system is configured to determine whether the signal output from the at least one sensor indicates one or more values exceeding a first threshold and one or more values exceeding a second threshold; and wherein the first threshold is set at a first percentage above a maximum rotation rate detected during a time period, and the second threshold is set at a second percentage below a maximum negative rotation rate detected during the time period.