Method and apparatus for increasing fluid recovery from a subterranean formation
US6622791B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 23, 2001 |
| Grant date | Sep 23, 2003 |
| Priority date | — |
| Expiry date | Oct 23, 2021 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/121
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A downhole injector 10, 26, 38 and 54 is provided at the lower end of the production tubing string TS for passing liquids from a downhole formation into the tubing string while preventing gases from passing through the injector. The injector of the present invention may be used with one or more lift valves LV for raising slugs of liquid upward to the surface through the production tubing string. The present invention may also be used with horizontal bore hole technology for increased hydrocarbon recovery by retaining the gases downhole to act upon liquid hydrocarbons and maintaining a driven force for pushing the liquids toward the injector for recovery. The injector may be used to enhance recovery of liquids at the surface of a well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.