1
Ruel C Terry: Producing methane from coal in situ. In Situ Technology, May 16, 1978: US04089374 (277 worldwide citation)

A well is drilled from the surface of the earth into an underground coal formation. The coal seam is fractured by fluids injected under pressure. Methane entrained in the cracks and fissures is removed to surface facilities. Coal seam in the vicinity of well bore is partially dewatered. Diameter of ...


2
Ruel C Terry: Generating electricity from coal in situ. In Situ Technology, February 10, 1981: US04250230 (264 worldwide citation)

The system of the invention comprises a two well system of gasifying coal in situ wherein the generated gas stream is directed to a gas separator, which, in turn separates hydrogen and carbon monoxide into separate streams. Hydrogen is directed to one type of fuel cell and carbon dioxide is directed ...


3
Terry Ruel C: Method of pyrolysis of coal in situ. In Situ Technology, Burton Crandell & Polumbus, December 9, 1975: US3924680 (254 worldwide citation)

A method of pyrolysis of coal in situ includes the steps of establishing a pair of passages between a sub-surface coal formation and the surface with the coal passages being adapted to separately remove liquids and gases from the coal formation, establishing a sump at the bottom of the passages whic ...


4
Ruel C Terry: Minimizing environmental effects in production and use of coal. In Situ Technology, September 19, 1978: US04114688 (251 worldwide citation)

Coal gas is produced in situ using the techniques of gasification, liquefaction and pyrolysis. Normal effluents to the atmosphere are recycled in part to the underground reaction zone for conversion into commercial products. Contaminants to underground aquifers are captured and injected into the und ...


5
Ruel C Terry: Methods of fluidized production of coal in situ. In Situ Technology, June 6, 1978: US04093025 (245 worldwide citation)

A method of producing combustible gases, synthetic crude oils, coal chemicals and heat from coal in situ utilizes the combined teachings of in situ gasification, liquefaction and pyrolysis.


6
Ruel C Terry: Method and apparatus for in situ gasification of coal and the commercial products derived therefrom. In Situ Technology, Burton Crandell & Polumbus, April 27, 1976: US03952802 (233 worldwide citation)

The process of the invention includes the concept of igniting a coal formation in situ with hot granular material and subsequently allowing the material to flow into the burning coal formation to serve as a propping agent in the event of a cave-in. Gasifying agents are injected into the formation in ...


7
Ruel Carlton Terry: Generating medium BTU gas from coal in situ. In Situ Technology, July 11, 1978: US04099567 (230 worldwide citation)

Medium BTU gas is generated from coal in situ by establishing communication channels through the coal in part by projectiles and in part by burning. Oxygen is employed for reaction with the coal and reaction temperatures are controlled by injection of steam.


8
Ruel C Terry: Method of recovering energy from subsurface petroleum reservoirs. In Situ Technology, Gary M Polumbus, June 28, 1977: US04031956 (229 worldwide citation)

The present invention is directed to a method of recovering energy from a subsurface petroleum formation by igniting the petroleum reservoir and burning as much petroleum as is possible thereby generating heat and recovering the heat so that it can be transformed into other forms of useful energy. T ...


9
Ruel C Terry: Producing thin seams of coal in situ. In Situ Technology, Gary M Polumbus, March 8, 1977: US04010800 (229 worldwide citation)

A method of extracting energy and chemical values from coal in situ including the steps of establishing passages among two or more coal seams underground and the surface of the ground wherein one coal seam is consumed by in situ combustion with the hot exit gases diverted through a second seam of co ...


10
Ruel C Terry: Methods of fluidized production of coal in situ. In Situ Technology, May 16, 1978: US04089372 (228 worldwide citation)

A method of producing combustible gases, synthetic crude oils, coal chemicals and heat from coal in situ utilizes the combined teachings of in situ gasification, liquefaction and pyrolysis.



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