In situ retorting of oil shale with pulsed water purge
US4637464A · kind A · utility
317Cited by
7References
6Claims
0Family size
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Key dates
| Filing date | Mar 22, 1984 |
| Grant date | Jan 20, 1987 |
| Priority date | — |
| Expiry date | Mar 22, 2004 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/35
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Product yield and quality is increased during in situ retorting of oil shale by pulsed combustion in which the flow of feed gas to the flame front is intermittently stopped while continuously retorting the oil shale. In the process, a water purge is injected into the retort between pulses of feed gas to enhance transfer of sensible heat from the combustion zone to the retorting zone and enlarge the separation between the combustion zone and the advancing front of the retorting zone. Retort water produced during retorting can be used as part of the water purge and/or feed gas for process economy and efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.