Electrical device for promoting oil recovery
US4466484A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 28, 1982 |
| Grant date | Aug 21, 1984 |
| Priority date | — |
| Expiry date | May 28, 2002 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B36/003
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention relates to a method and device for promoting oil recovery. The device according to the invention for promoting the recovery of oil contained in a reservoir formation from a well equipped with a casing, comprises an anode which is placed at the bottom of the well, below said reservoir formation, in an electro-conductive liquid, and which is connected to the positive terminal of a direct or pulsed source of unidirectional voltage. Said casing is connected to the negative terminal of said source. The method consists in applying a unidirectional voltage for periods varying between several days and several months and alternating with OFF-period (when no voltage is applied).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.