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Class Information
Number: 299/2
Name: Mining or in situ disintegration of hard material > Tunnel recovery of fluid material
Description: Process or apparatus comprising recovering valuable material in the fluid state from the earth and including (1) process steps involving the construction or use of a horizontal passage in which a human may work or (2) the structure of a horizontal passage in which a human may work.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 4194789 |
Staggered array of explosives for fragmented oil shale formation toward a vertical free face |
Mar. 25, 1980 |
| 4194788 |
Method of forming a rubblized in-situ retort |
Mar. 25, 1980 |
| 4192554 |
Method for explosive expansion toward horizontal free faces for forming an in situ oil shale retort |
Mar. 11, 1980 |
| 4192553 |
Method for attenuating seismic shock from detonating explosive in an in situ oil shale retort |
Mar. 11, 1980 |
| 4192381 |
In situ retorting with high temperature oxygen supplying gas |
Mar. 11, 1980 |
| 4192552 |
Method for establishing a combustion zone in an in situ oil shale retort having a pocket at the top |
Mar. 11, 1980 |
| 4191251 |
Process for recovering carbonaceous values from in situ oil shale retorting |
Mar. 4, 1980 |
| 4185871 |
In-situ retorting system |
Jan. 29, 1980 |
| 4181177 |
Controlling shale oil pour point |
Jan. 1, 1980 |
| 4181362 |
Liquid seal for production level bulkhead for in situ oil shale retort |
Jan. 1, 1980 |
| 4181361 |
Gas collection system for oil shale retort |
Jan. 1, 1980 |
| 4178039 |
Water treatment and heating in spent shale oil retort |
Dec. 11, 1979 |
| 4176882 |
In situ oil shale retorts with gas barriers for maximizing product recovery |
Dec. 4, 1979 |
| 4175490 |
Process for producing an underground zone of fragmented and pervious material |
Nov. 27, 1979 |
| 4174751 |
Method of breaking shale oil-water emulsion |
Nov. 20, 1979 |
| 4171146 |
Recovery of shale oil and magnesia from oil shale |
Oct. 16, 1979 |
| 4169506 |
In situ retorting of oil shale and energy recovery |
Oct. 2, 1979 |
| 4167213 |
Method for determining the position and inclination of a flame front during in situ combustion of a rubbled oil shale retort |
Sep. 11, 1979 |
| 4167291 |
Method of forming an in situ oil shale retort with void volume as function of kerogen content of formation within retort site |
Sep. 11, 1979 |
| 4166721 |
Determining the locus of a processing zone in an oil shale retort by off gas composition |
Sep. 4, 1979 |
| 4165903 |
Mine enhanced hydrocarbon recovery technique |
Aug. 28, 1979 |
| 4163475 |
Determining the locus of a processing zone in an in situ oil shale retort |
Aug. 7, 1979 |
| 4162808 |
In-situ retorting of carbonaceous deposits |
Jul. 31, 1979 |
| 4162706 |
Determining the locus of a processing zone in an oil shale retort by monitoring pressure drop across the retort |
Jul. 31, 1979 |
| 4160481 |
Method for recovering subsurface earth substances |
Jul. 10, 1979 |
| 4158467 |
Process for recovering shale oil |
Jun. 19, 1979 |
| 4156461 |
Decreasing hydrocarbon, hydrogen and carbon monoxide concentration of a gas |
May. 29, 1979 |
| 4153297 |
Ground water control for an in situ oil shale retort |
May. 8, 1979 |
| 4153298 |
Removal of pillars from a void for explosive expansion toward the void |
May. 8, 1979 |
| 4153300 |
Recovery of fluid fuels by in-situ retorting of carbonaceous deposits |
May. 8, 1979 |
| 4153110 |
Ignition of fragmented oil shale below a sill pillar in an in situ oil shale retort |
May. 8, 1979 |
| 4153299 |
Combustion air supply to in-situ retorts |
May. 8, 1979 |
| 4151877 |
Determining the locus of a processing zone in a retort through channels |
May. 1, 1979 |
| 4150722 |
Determining the locus of a retorting zone in an oil shale retort by rate of shale oil production |
Apr. 24, 1979 |
| 4149592 |
Containers for indicators |
Apr. 17, 1979 |
| 4149752 |
Operation of an in situ oil shale retort |
Apr. 17, 1979 |
| 4149595 |
In situ oil shale retort with variations in surface area corresponding to kerogen content of formation within retort site |
Apr. 17, 1979 |
| 4148358 |
Oxidizing hydrocarbons, hydrogen, and carbon monoxide |
Apr. 10, 1979 |
| 4148529 |
Doping a retort to determine the locus of a processing zone |
Apr. 10, 1979 |
| 4147389 |
Method for establishing a combustion zone in an in situ oil shale retort |
Apr. 3, 1979 |
| 4147388 |
Method for in situ recovery of liquid and gaseous products from oil shale deposits |
Apr. 3, 1979 |
| 4146272 |
Explosive placement for explosive expansion toward spaced apart voids |
Mar. 27, 1979 |
| 4143917 |
In-situ retorting of oil shale with in-situ formed arches |
Mar. 13, 1979 |
| 4140181 |
Two-stage removal of sulfur dioxide from process gas using treated oil shale |
Feb. 20, 1979 |
| 4140343 |
Gas withdrawal from an in situ oil shale retort |
Feb. 20, 1979 |
| 4133580 |
Isolation of in situ oil shale retorts |
Jan. 9, 1979 |
| 4133380 |
Establishing a combustion zone below a sill pillar in an in situ oil shale retort |
Jan. 9, 1979 |
| 4131416 |
Slurry backfilling of in situ oil shale retort |
Dec. 26, 1978 |
| 4126180 |
Method of enhancing yield from an in situ oil shale retort |
Nov. 21, 1978 |
| 4125157 |
Removing sulfur dioxide from gas streams with retorted oil shale |
Nov. 14, 1978 |
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