Formation-tailored method and apparatus for uniformly heating long subterranean intervals at high temperature
US4570715A · kind A · utility
367Cited by
9References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 6, 1984 |
| Grant date | Feb 18, 1986 |
| Priority date | — |
| Expiry date | Apr 6, 2004 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B36/04
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Long intervals of subterranean earth formations are heated at high temperatures for long times with an electrical heater containing spoolable, steel sheathed, mineral insulated cables which have high electrical conductivities, enabling them to heat the earth formations at a substantially uniform rate of more than about 100 watts per foot at temperatures between about 600.degree. and 1000.degree. C., with a pattern of localized electrical resistances which are correlated with the heat conductivities of the earth formations and the heat stabilities of materials providing power and support for the heater.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.