Mining or in situ disintegration of hard material – Automatic control; signaling or indicating – Of hard material disintegrating machine
Patent
1980-03-24
1982-02-16
Purser, Ernest R.
Mining or in situ disintegration of hard material
Automatic control; signaling or indicating
Of hard material disintegrating machine
166251, 166261, 299 2, E21C 4110, E21B 43247
Patent
active
043156568
ABSTRACT:
Disclosed is a method for reducing the porosity of a zone within mass of unretorted rubblized oil shale comprising locating the zone; providing fluid communication to the zone; introducing grout slurry by fluid communication to the zone so as to deposit slurry and reduce porosity. Also disclosed is an improved method for the subterranean in situ retorting of oil shale comprising establishing a retorting zone containing a rubblized mass comprising oil shale; establishing an essentially planar flame front within the retorting zone; introducing oxygen containing gas into the retorting zone to support combustion at the flame front thereby forming hot combustion gases which effect retorting of the oil shale; locating an area of the flame front which advanced ahead of the essentially planar flame front; and introducing grout slurry to the advanced area to reduce gas permeability and retard further advancement of that area of the flame front.
REFERENCES:
patent: 3198249 (1965-08-01), Willman
patent: 3547195 (1970-12-01), Elkins
patent: 3978920 (1976-09-01), Bandyopadhyay et al.
patent: 4166721 (1979-09-01), Cha
patent: 4231617 (1980-11-01), Larson et al.
Magidson William H.
McClain William T.
Purser Ernest R.
Standard Oil Company (Indiana)
Tolpin Thomas W.
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