1
Tham Min Jack, Closmann Philip Joseph: Recovering oil from a subterranean carbonaceous formation. Shell Oil Company, July 15, 1975: US3894769 (116 worldwide citation)

In a process for recovering oil from oil shale which comprises injecting a fluid A, such as steam, into contact with finely-divided, unconsolidated, solid particles in a rubbled oil shale chimney; withdrawing fluids from the chimney from a point above the injection point of fluid A, and adjusting th ...


2
Tham Min Jack, Closmann Philip Joseph: Solvent/non-solvent pyrolysis of subterranean oil shale. Shell Oil Company, Coryell Harold W, April 29, 1975: US3880238 (29 worldwide citation)

In a process for recovering shale oil by injecting and producing fluid into and out of a rubble-containing cavity in an otherwise substantially impermeable subterranean oil shale, the tendency for the flow path to become plugged is reduced by injecting both a hot solvent-fluid and a non-solvent-gas ...