Recovery of oil and gas from oil shale
Recovery of oil from oil sands
Recovery of oil from oil shale
Recovery of oil from oil shale
Recovery of oil from oil shale
Recovery of oil from oil-bearing carbonates
Recovery of oil from oil-bearing limestone
Recovery of oil from tar sands
Recovery of oil from tar sands
Recovery of retorted shale from an oil shale retorting process
Recycle classifier for retorting oil shale
Recycling aerated scavenged middlings to conditioning step of ho
Reduction in pour point of shale oil
Refrigerator oil composition
Regeneration of ZnC12
Removal of nitrogen and sulfur from oil-shale
Rerefining of used motor oils
Retorting oil shale with iron oxide impregnated porous pellets
Retorting process
Retorting process for hydrocarbonaceous solids