In-situ retorting of carbonaceous deposits

Details In-situ retorting of carbonaceous deposits In-situ retorting of carbonaceous deposits

1978-05-23

1979-07-31

Purser, Ernest R.

Mining or in situ disintegration of hard material

Tunnel recovery of fluid material

166259, E21C 4112

Patent

active

041628080

ABSTRACT:
A method of producing fluid fuels from carbonaceous deposits such as oil shale, heavy oils and coal by in-situ retorting of the carbonaceous deposit in rubblized in-situ retorts utilizes a plurality of such retorts. The retorts are subjected to a sequence of preparation for rubblization, rubblization and combustion of carbonaceous material to supply heat to produce a fluid fuel from kerogen in the carbonaceous deposit. At least one completely rubblized retort is maintained throughout its entire volume under the inlet pressure of the combustion air between retorts in which rubblization or stopping is taking place and retorts in which the combustion of the carbonaceous deposit is proceeding to prevent flow of toxic gases from the retort in which combustion is proceeding to a retort in which preparation for rubblization and rubblization are occurring. The invention is described in detail for the recovery of shale oil from oil shale deposits.

REFERENCES:
patent: 3349848 (1967-10-01), Burgh
patent: 3917344 (1975-11-01), Janssen et al.
patent: 3950029 (1976-04-01), Timmins

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