In-well rigless ESP
US8381820B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 18, 2010 |
| Grant date | Feb 26, 2013 |
| Priority date | — |
| Expiry date | Feb 12, 2031 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/128
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An in-well ESP string that can be installed or retrieved with a wireline instead of a rig. The ESP is combined with a motor and a hydraulic valve to pump formation fluid from a well to the surface. A wet connector is used to facilitate electrical and hydraulic connections. The ESP system is disposed within a tubing string located within the casing of a well. The hydraulic valve controls the flow of formation fluid to the ESP, opening to allow formation fluid to flow to the ESP, and closing to shut off production. When the valve is closed, the ESP may be cleaned with brine introduced via a flow port in the valve. This cleaning operation allows the ESP string to be to retrieved in an environmentally friendly manner. In addition, the wireline installation and retrieval is significantly less costly and less complicated than currently possible with a rig.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.