System and method for controlling a progressing cavity well pump
US7870900B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 16, 2007 |
| Grant date | Jan 18, 2011 |
| Priority date | — |
| Expiry date | Oct 10, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/008
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A system and method for controlling the speed of a progressing cavity liquid well pump to increase liquid production from a well while avoiding operation of the well in a pumped-off state. A controller controls a variable speed drive to drive a progressing cavity liquid well pump at a set pump speed while measuring well and system parameters indicative of pumping performance and/or liquid production from the well. The set speed of the pump is changed in steps either increasingly or decreasingly by the controller, acting through the variable speed drive, in response to the measured well and system parameters. The controller, responsive to the measured well and system parameters, challenges the set pump speed by varying the set pump speed so as to increase the production from the well while avoiding pump and well operation in a pumped-off state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.