The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 16, 1982
Filed:
Mar. 24, 1980
Robert D Hall, Wheaton, IL (US);
Standard Oil Company (Indiana), Chicago, IL (US);
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.