E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
196/34, 166/36
E21B 43/24 (2006.01) E21B 43/247 (2006.01)
Patent
CA 1046402
ABSTRACT An in situ process for retorting if subsurface oil shale deposits in which a cavity of expanded particles of oil shale is formed within the deposit, combustion is maintained in the upper levels of the cavity by introducing air at the top of the cavity, and product liquids and gases are removed at the bottom of the cavity. The product gases are withdrawn by pumping means which lowers the pressure within the cavity below ambient pressure to prevent leakage of the product gases form the cavity into adjacent working spaces. - 1 -
232379
Burton Robert S. (iii)
Cha Chang Y.
Ridley Richard D.
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