Tertiary recovery method using inverted deviated holes
US4646836A · kind A · utility
92Cited by
7References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 20, 1984 |
| Grant date | Mar 3, 1987 |
| Priority date | — |
| Expiry date | Dec 20, 2004 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/30
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method for enhanced oil recovery from a subsurface earth formation is disclosed. At least one essentially upward deviated hole from a vertical shaft in the formation is formed. An outer loop borehole is formed in proximity with the deviated hole. A heating fluid is injected from the surface to the outer loop borehole to heat the formation in proximity with the upward deviated hole to facilitate drainage of oil and the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.