Recovering metal values from geothermal brine
Recovering uranium from coal in situ
Recovery of alkali values from trona deposits
Recovery of hydrocarbons from deep underground deposits of tar s
Recovery system for oil shale deposits
Residue recovery process and apparatus
Restoration of a leached underground reservoir
Restoration of uranium solution mining deposits
Retrogressively in-situ ore body chemical mining system and meth
Rubble mining