Method and apparatus for combating encroachment by in situ treated formations
US4576231A · kind A · utility
340Cited by
8References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 13, 1984 |
| Grant date | Mar 18, 1986 |
| Priority date | — |
| Expiry date | Sep 13, 2004 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/003
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method and apparatus is applicable to in situ heating of oil shale or tar sand. The heating is by radio frequency that is applied down hole by a central conductor that extends beyond a coaxial shielding conductor to form the antenna or applicator. Encroachment by the heated formation is overcome by applying motion to the central conductor to remove encroaching formations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.