| Patent | Date |
|---|
Upgrading shale oil by a combination process
Grant 4,623,444 - Che , et al. November 18, 1 | 1986-11-18 |
Upgrading shale oil by a combination process
Grant 4,605,489 - Madgavkar August 12, 1 | 1986-08-12 |
Method for fully retorting an in situ oil shale retort
Grant 4,595,056 - Zahradnik , et al. June 17, 1 | 1986-06-17 |
Method for control of geometry of fragmented mass in an situ oil shale retort
Grant 4,560,205 - Ricketts December 24, 1 | 1985-12-24 |
Method for loading explosive charges into blastholes formed in a subterranean formation
Grant 4,513,665 - Ricketts , et al. April 30, 1 | 1985-04-30 |
Formation of in situ oil shale retort in plural steps
Grant 4,458,944 - Fernandes July 10, 1 | 1984-07-10 |
Method for controlling void in an in situ oil shale retort
Grant 4,440,444 - Ricketts April 3, 1 | 1984-04-03 |
Method for forming a module of in situ oil shale retorts
Grant 4,440,446 - Hutchins April 3, 1 | 1984-04-03 |
Reduction of shale oil pour point
Grant 4,437,519 - Cha , et al. March 20, 1 | 1984-03-20 |
Two-pass method for developing a system of in situ oil shale retorts
Grant 4,397,502 - Hines August 9, 1 | 1983-08-09 |
Horizontal free face blasting for minimizing channeling and mounding
Grant 4,396,231 - Ricketts August 2, 1 | 1983-08-02 |
Method of rubbling oil shale
Grant 4,372,615 - Ricketts February 8, 1 | 1983-02-08 |
Method for igniting an in situ oil shale retort
Grant 4,369,841 - Cha January 25, 1 | 1983-01-25 |
Analyzing oil shale retort off-gas for carbon dioxide to determine the combustion zone temperature
Grant 4,369,842 - Cha January 25, 1 | 1983-01-25 |
Method of blasting pillars with vertical blastholes
Grant 4,353,598 - Ricketts October 12, 1 | 1982-10-12 |
Downhole delay assembly for blasting with series delay
Grant 4,347,789 - Ricketts September 7, 1 | 1982-09-07 |
Determining the locus of a processing zone in an in situ oil shale retort through a well in the formation adjacent the retort
Grant 4,344,484 - Ridley August 17, 1 | 1982-08-17 |
Method for forming an in situ oil shale retort
Grant 4,326,752 - Ricketts April 27, 1 | 1982-04-27 |
Method and apparatus for igniting an in situ oil shale retort
Grant 4,301,866 - Burton , et al. November 24, 1 | 1981-11-24 |
Thermally insulated bulkhead for in situ oil shale retort
Grant 4,294,563 - Kilburn October 13, 1 | 1981-10-13 |
Method for assuring uniform combustion in an in situ oil shale retort
Grant 4,263,970 - Cha * April 28, 1 | 1981-04-28 |
Method of doping retort with a halogen source to determine the locus of a processing zone
Grant 4,249,602 - Burton, III , et al. February 10, 1 | 1981-02-10 |
Doping a retort with radioactive nuclides to determine the locus of a processing zone
Grant 4,249,603 - Skogen February 10, 1 | 1981-02-10 |
Apparatus and method for igniting an in situ oil shale retort
Grant 4,245,701 - Chambers January 20, 1 | 1981-01-20 |
Operation of in situ oil shale retort with void at the top
Grant 4,243,100 - Cha January 6, 1 | 1981-01-06 |
Method of attenuating airblast from detonating explosive in an in situ oil shale retort
Grant 4,239,285 - French December 16, 1 | 1980-12-16 |
In situ oil shale retort with intermediate gas control
Grant 4,239,283 - Ridley December 16, 1 | 1980-12-16 |
Formation of in situ oil shale retort with void at the top
Grant 4,238,136 - Ricketts December 9, 1 | 1980-12-09 |
Locating the top of an in situ oil shale retort for ease of ignition
Grant 4,227,574 - Cha October 14, 1 | 1980-10-14 |
Determining the locus of a processing zone in an oil shale retort by effluent water composition
Grant 4,223,726 - Cha September 23, 1 | 1980-09-23 |
Means for providing gas seal in production level drift for in situ oil shale retort
Grant 4,200,336 - Burton, III April 29, 1 | 1980-04-29 |
Staggered array of explosives for fragmented oil shale formation toward a vertical free face
Grant 4,194,789 - Studebaker , et al. March 25, 1 | 1980-03-25 |
In situ retorting with high temperature oxygen supplying gas
Grant 4,192,381 - Cha March 11, 1 | 1980-03-11 |
Water treatment and heating in spent shale oil retort
Grant 4,178,039 - Burton, III December 11, 1 | 1979-12-11 |
Method of breaking shale oil-water emulsion
Grant 4,174,751 - Compton November 20, 1 | 1979-11-20 |
Determining the locus of a processing zone in an oil shale retort by off gas composition
Grant 4,166,721 - Cha September 4, 1 | 1979-09-04 |
Determining the locus of a processing zone in an in situ oil shale retort
Grant 4,163,475 - Cha , et al. August 7, 1 | 1979-08-07 |
Decreasing hydrocarbon, hydrogen and carbon monoxide concentration of a gas
Grant 4,156,461 - Cha May 29, 1 | 1979-05-29 |
Ignition of fragmented oil shale below a sill pillar in an in situ oil shale retort
Grant 4,153,110 - Ridley May 8, 1 | 1979-05-08 |
Determining the locus of a processing zone in a retort through channels
Grant 4,151,877 - French May 1, 1 | 1979-05-01 |
Containers for indicators
Grant 4,149,592 - Burton , et al. April 17, 1 | 1979-04-17 |
Method and apparatus for measuring kerogen content of oil shale
Grant 4,149,805 - Chew, III April 17, 1 | 1979-04-17 |
Operation of an in situ oil shale retort
Grant 4,149,752 - Cha , et al. April 17, 1 | 1979-04-17 |
In situ oil shale retort with variations in surface area corresponding to kerogen content of formation within retort site
Grant 4,149,595 - Cha April 17, 1 | 1979-04-17 |
Fluidized bed process for retorting oil shale
Grant 4,148,710 - Burton, III April 10, 1 | 1979-04-10 |
Method for establishing a combustion zone in an in situ oil shale retort
Grant 4,147,389 - Bartel , et al. April 3, 1 | 1979-04-03 |
Explosive placement for explosive expansion toward spaced apart voids
Grant 4,146,272 - French March 27, 1 | 1979-03-27 |
Two-stage removal of sulfur dioxide from process gas using treated oil shale
Grant 4,140,181 - Ridley , et al. February 20, 1 | 1979-02-20 |
Determining the locus of a processing zone in an in situ oil shale retort by pressure monitoring
Grant 4,120,354 - Ridley , et al. October 17, 1 | 1978-10-17 |
In situ oil shale retort with a horizontal sill pillar
Grant 4,118,071 - Hutchins October 3, 1 | 1978-10-03 |
Method of breaking shale oil-water emulsion
Grant 4,109,718 - Burton, III August 29, 1 | 1978-08-29 |
Method for preconditioning oil shale preliminary to explosive expansion and in situ retorting thereof
Grant 4,109,964 - Ridley August 29, 1 | 1978-08-29 |
Removal of sulfur dioxide from process gas using treated oil shale and water
Grant 4,093,026 - Ridley June 6, 1 | 1978-06-06 |
Determining the locus of a processing zone in an in situ oil shale retort by sound monitoring
Grant 4,082,145 - Elkington April 4, 1 | 1978-04-04 |
Oil shale retort flue gas cooling and cleaning
Grant RE29,553 - Burton, III , et al. February 28, 1 | 1978-02-28 |
Forming shale oil recovery retort by blasting into slot-shaped columner void
Grant 4,043,596 - Ridley August 23, 1 | 1977-08-23 |
Method of loading blast hole with explosive
Grant 4,036,099 - French July 19, 1 | 1977-07-19 |
Enriching off gas from oil shale retort
Grant 4,036,299 - Cha , et al. July 19, 1 | 1977-07-19 |
Method of recovering oil and water from in situ oil shale retort flue gas
Grant 4,029,360 - French June 14, 1 | 1977-06-14 |
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