Apparatus and method of monitoring an alternating current component of a downhole electrical imbalance voltage
US8267171B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 18, 2009 |
| Grant date | Sep 18, 2012 |
| Priority date | — |
| Expiry date | Nov 18, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R29/16
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An apparatus and method are provided for monitoring and controlling a power system of an electrical submersible pump assembly. A sensor monitors an alternating current component of a downhole electrical imbalance voltage at a neutral point of a motor of the electrical submersible pump assembly. The sensor measurement is transmitted to a controller at the surface. The controller analyzes the alternating current component of the downhole electrical imbalance voltage and then adjusting an operation of the electrical submersible pump assembly, or scheduling maintenance, accordingly. Also, a model of a power system of an electrical submersible pump assembly is created to predict an alternating current component of a downhole electrical imbalance voltage. The model is modified as necessary responsive to measurements from the sensor. A controller adjusts surface currents according to the model of the power system to match downhole motor drive currents to thereby optimize the power system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.