http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4200336-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0644c582117d25c1376fbc6d23d1535e |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B43-247 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21C41-24 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B43-247 |
| filingDate | 1978-07-17^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1980-04-29^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7a9eaaa1a86b4cd44c70ace3bbee31d0 |
| publicationDate | 1980-04-29^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-4200336-A |
| titleOfInvention | Means for providing gas seal in production level drift for in situ oil shale retort |
| abstract | An in situ oil shale retort is formed in a subterranean formation containing oil shale. The retort contains a fragmented permeable mass of formation particles containing oil shale. During retorting, oxygen-supplying gas is introduced into an upper level of the fragmented mass for establishing a combustion zone and for advancing the combustion zone downwardly through the fragmented mass. Liquid and gaseous products, including shale oil and off gas, are withdrawn from a generally U-shaped production level drift at a lower level of the fragmented mass. Liquid in a lower portion of the U seals against the roof of the drift to provide a gas seal which inhibits passage of off gas from a first leg of the drift in communication with the retort to a second leg of the drift remote from the retort. A retaining wall in the second leg of the drift can provide lateral support for the liquid forming the gas seal, and help minimize the depth of excavation of the U-shaped drift. Shale oil and off gas can be separately withdrawn from the first leg of the drift. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4431055-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4366986-A |
| priorityDate | 1978-07-17^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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