Mining or in situ disintegration of hard material – Tunnel recovery of fluid material
Patent
1975-03-10
1977-05-10
Purser, Ernest R.
Mining or in situ disintegration of hard material
Tunnel recovery of fluid material
166256, 166302, E21C 4110, E21B 4300
Patent
active
040225119
ABSTRACT:
An in situ oil shale retort is provided with a retort off gas cooling zone in the in situ retort at the product outlet end of the in situ retort. The kerogen in the in situ retort is converted to liquid and gaseous products by moving a heated gas through a retorting zone in the in situ retort and toward the product outlet end of the in situ retort. The movement of gas through the retorting zone is terminated when the retort off gas moving from the product outlet end of the in situ retort attains a temperature above which the temperature of the retort off gases will deleteriously effect product collection and removal apparatus in a collection zone adjacent to the product outlet end of the in situ retort. A reduced kerogen content of the oil shale in the retort off gas cooling zone as compared with the average kerogen content of oil shale in the in situ retort improves the yield of products from the in situ retort.
REFERENCES:
patent: 1913395 (1933-06-01), Karrick
patent: 3001776 (1961-09-01), Poollen
patent: 3228471 (1966-01-01), Shook
patent: 3406755 (1968-10-01), Sharp
patent: 3620301 (1971-11-01), Nichols et al.
Occidental Petroleum Corporation
Pate III William F.
Purser Ernest R.
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