Electric submersible pump event detection

Abstract

A method for monitoring operation of an electric submersible pump. The method includes receiving data signals indicating values for a plurality of parameters regarding operation of the electric submersible pumping system; establishing, for at least some of the plurality of parameters, an associated reference signal; and detecting a deviation of one of the parameters from the reference signal associated with that parameter. As a result of the deviation having a rate of change below a predetermined threshold, the method includes updating the value of the reference signal to reflect the deviation. As a result of the deviation having a rate of change above the predetermined threshold, the method includes detecting an event and generating an indication of the event. The indication of the event further depends on a type of the parameter and a direction of the deviation from the reference signal.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]The present application claims priority to U.S. Provisional Application No. 62 / 089,480 filed Dec. 9, 2014, entitled “Electric Submersible Pump Event Detection,” which is incorporated herein by reference in its entirety for all purposes.BACKGROUND[0002]Electric submersible pumps (ESPs) may be deployed for any of a variety of pumping purposes, and often comprise a submersible pump powered by a submersible motor which is protected by a motor protector. For example, where a substance (e.g., hydrocarbons in an earthen formation) does not readily flow responsive to existing natural forces, an ESP may be implemented to artificially lift the substance. If an ESP fails during operation, the ESP must be removed from the pumping environment and replaced or repaired, either of which results in a significant cost to an operator.[0003]In various applications, sensors or other detectors are used to detect pumping system failure and to output a warning r...

AI Technical Summary

Benefits of technology

The present invention relates to a method, system, and computer-readable media for monitoring the operation of an electric submersible pump. The system receives data signals from sensors that indicate various parameters about the pump's operation and establishes a reference signal for comparison. If the deviation of a parameter from the reference signal is small and relatively stable, the method updates the reference signal to reflect the deviation. If the deviation is significant and indicates an event, such as a potential failure, the method generates an indication of the event. The indication of the event depends on the type of parameter and the direction of the deviation. This invention can help to improve the efficiency and reliability of electric submersible pumps by detecting abnormal operation and taking appropriate measures, such as repairing or replacing the pump.

Problems solved by technology

If an ESP fails during operation, the ESP must be removed from the pumping environment and replaced or repaired, either of which results in a significant cost to an operator.

However, such techniques may not address pumping system issues soon enough and may be subject to errors.

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