| 摘要 |
A system for monitoring an Electrical Submersible Pump is disclosed comprising a rotation rate sensor, angular rate sensor or a rotational acceleration sensor located in an ESP gauge 6. When the Electrical Submersible Pump is started the rotating elements rotate in a first direction whilst the static elements will experience an opposing torque in a second opposite direction. The small rotational movement of the ESP gauge housing is sensed by the sensor and is used to determine the initial direction of rotation of the motor and pump 6. Embodiments are also claimed wherein a control and processing system is arranged to accelerate said motor and / or said pump and then determine the direction of rotation and to decelerate said motor and / or said pump and then determine the direction; a processing system determines the rotational noise or one or more measures of the rotational noise of said motor and / or said pump; a control system is arranged to change, vary, sweep or scan the rotational rate of said motor and / or said pump, and a processing system which determines one or more optimal or advantageous rotational rates and / or one or more sub-optimal or disadvantageous rotational rates for said motor and / or said pump. Further similar embodiments are claimed wherein instead of a rotation rate sensor, angular rate sensor or a rotational acceleration sensor, two or more translational accelerometers and means for producing a rotation rate or rotational acceleration signal from signals output from said two or more translational accelerometers are used. The sensor may be an angular rate sensing gyroscope. The sensor may measure the rotation rate by measuring the Coriolis force on one or more vibrating elements. |
