Submersible pump control

Patent metadata

Field	Value
Publication number	US-9720424-B2
Application number	US-201514708976-A
Country	US
Kind code	B2
Filing date	May 11, 2015
Priority date	Jan 10, 2012
Publication date	Aug 1, 2017
Grant date	Aug 1, 2017

Abstract

A system can include an interface to receive sensed data and economic data; a production control framework that includes a module for modeling motor efficiency of an electric submersible pump, a module for modeling gas composition of a fluid being pumped by an electric submersible pump, a module for modeling solid dynamics in a fluid being pumped by an electric submersible pump, a module to update one or more of the modules for modeling in response to receipt of data via the interface; and an interface to output control commands to a controller for an electric submersible pump based at least in part on data received by the interface and analyzed by the production control framework. Various other apparatuses, systems, methods, etc., are also disclosed.

First claim

What is claimed is:

1. A method comprising:
receiving economic data;
sensing data associated with operation of a well;
based at least in part on the sensing data, modeling an electric submersible pump disposed in the well,
gas composition of fluid being pumped by the electric submersible pump, and
solid dynamics in a fluid being pumped by the electric submersible pump;

based on the modeling and the economic data, adjusting a speed of the electric submersible pump by adjusting a voltage of a motor of the electric submersible pump while maintaining a constant frequency;
searching for a minimum current draw; and
operating the motor at a voltage that corresponds to the minimum current draw.

2. The method of claim 1 , wherein adjusting the voltage of the motor is subject to an adjustment limit.

3. The method of claim 2 , wherein the adjustment limit is a percentage about a mid-point voltage.

4. The method of claim 1 , additionally comprising monitoring for a ground fault.

5. One or more non-transitory computer-readable media comprising processor-executable instruction to instruct a computing device to perform the method of claim 1 .

Assignees

• Schlumberger Technology Corp

Inventors

• Ige Adunola
• Ilochonwu Obinna
• Watson Arthur I
• Harris Grant T
• Roberge Ian

Classifications

• E21B43/128 Primary

  Adaptation of pump systems with down-hole electric drives · CPC title

• G05B17/02

  electric · CPC title

• G05D7/0676 Primary

  by action on flow sources (G05D7/0688, G05D7/0694 take precedence) · CPC title

• G05B15/02

  electric · CPC title

• G05B13/04

  involving the use of models or simulators · CPC title