11
Ruel C Terry: Underground linkage of wells for production of coal in situ. In Situ Technology, January 29, 1980: US04185692 (174 worldwide citation)

In preparation for producing coal in situ two or more production wells are linked together through the coal seam by burned channels created by one or more blind hole burns.


12
Ruel C Terry: Methods of fluidized production of coal in situ. In Situ Technology, January 24, 1978: US04069868 (163 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 in separated coal blocks.


13
Xerxes T Stoddard, Vesper A Vaseen, Ruel C Terry: Minimizing subsidence effects during production of coal in situ. In Situ Technology, Ruel C Terry, May 15, 1984: US04448252 (91 worldwide citation)

Coal is reduced to ash in place by gasification using in situ production techniques, resulting in significant void space underground, which in turn causes roof fall and subsidence. Overburden collapse is stabilized by backfilling with foaming mud cement that hardens into an expanded solid, which que ...


14
Xerxes T Stoddard, Vesper A Vaseen, Ruel C Terry: Minimizing subsidence effects during production of coal in situ. In Situ Technology, Ruel C Terry, August 7, 1984: US04463807 (90 worldwide citation)

Coal is reduced to ash in place by gasification using in situ production techniques, resulting in significant void space underground, which in turn causes roof fall and subsidence. Overburden collapse is stabilized by backfilling with foaming mud cement that hardens into an expanded solid, which que ...


15
Ruel C Terry: Initiating production of methane from wet coal beds. In Situ Technology, Ruel C Terry, October 1, 1985: US04544037 (69 worldwide citation)

Production of methane from an underground wet coal seam is initiated by drilling a well from the surface of the earth through the seam. Rather than pumping water to lower hydraulic head on the seam to permit desorption of methane within the coal, high pressure gas is injected into the seam to drive ...


16
Xerxes T Stoddord, Vesper A Vaseen, Xerxes T Stoddard: Minimizing subsidence effects during production of coal in situ. In Situ Technology, Ruel C Terry, August 14, 1984: US04465401 (32 worldwide citation)

Coal is reduced to ash in place by gasification using in situ production techniques, resulting in significant void space underground, which in turn causes roof fall and subsidence. Overburden collapse is stabilized by backfilling with foaming mud cement that hardens into an expanded solid, which que ...


17
Ruel C Terry: Method of in situ gasification, cooling and liquefaction of a subsurface coal formation. In Situ Technology, Burton Crandell & Polumbus, April 6, 1976: US03948320 (9 worldwide citation)

A method of liquefying a coal formation in situ wherein the coal formation has been preheated as by a coal gasification project, includes the steps of establishing injection and removal passages connecting the coal formation to the surface, injecting water having a temperature below the formation te ...


18
Ruel C Terry: Sealing an underground coal deposit for in situ production. In Situ Technology, July 25, 1978: US04102397 (8 worldwide citation)

A previously mined underground coal deposit is sealed so that the underground void space can be pressurized for production by in situ techniques. Excavated communication passages are sealed by barricades which are further sealed by applying hydrostatic head pressure. Subsidence cracks are sealed by ...


19
Ruel Carlton Terry: Recovering uranium from coal in situ. In Situ Technology, September 12, 1978: US04113313 (7 worldwide citation)

An underground carbonaceous deposit containing other mineral values is burned in situ. The underground hot zone is cooled down to temperature below the boiling point of a leaching solution. The leaching solution is percolated through the residial ash, with the pregnant solution recovered for separat ...


20
Ruel Carlton Terry: Gasification of coal in situ. In Situ Technology, April 19, 1977: US04018481 (6 worldwide citation)

This invention relates to the production of combustible gases from coal in situ, in which one or more passages are established between the surface of the ground and an underground coal deposit. The coal is set afire and the fire is sustained by injection of an oxidizer for a period of time. Oxidizer ...