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U.S. Department of Energy
Office of Scientific and Technical Information

Recovering oil from nuclear chimneys in oil-yielding solids

Patent ·
OSTI ID:7155010

Air- or other oxygen-containing gas is injected into the lower portion of a previously retorted nuclear chimney to burn coke and raise the temperature to a level at which the compressive strength of the shale rubble is substantially reduced. Reduction of the compressive strength of the shale results in compaction of the spent shale and consequent loss of support of the roof of the chimney, causing sloughing of raw shale onto the retorted mass where it is then retorted by hot combustion gases rising through the rubble. (7 claims)

Assignee:
Phillips Petroleum Co.
Patent Number(s):
US 3460620
OSTI ID:
7155010
Country of Publication:
United States
Language:
English