In situ process for recovery of carbonaceous materials from subt

Wells – Processes – In situ combustion

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166281, 166303, E21B 4324, E21B 4326

Patent

active

040918696

ABSTRACT:
A method is disclosed for recovering carbonaceous material from a subterranean deposit such as oil shale. A first zone of the subterranean deposit is heated to liquefy and vaporize carbonaceous materials contained therein. A substantial portion of the carbonaceous materials are removed from this first zone. Thereafter a second zone of the deposit is rubblized such that material of the second zone occupies a portion of the space occupied by the first zone. The second zone is then heated and carbonaceous materials are removed therefrom.

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patent: 3882941 (1975-05-01), Pelofsky
patent: 3980339 (1976-09-01), Heald et al.
patent: 4015664 (1977-04-01), Acheson et al.

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