Underground gasification of bituminous coal
Underground linkage of wells for production of coal in situ
Unique method of hydraulic fracturing
Upgrading and recovery of heavy crude oils and natural bitumens
Upgrading and recovery of heavy crude oils and natural...
Use of recycled combustion gas during termination of an in-situ
Vapor-extraction system for removing hydrocarbons from soil
Vicous oil recovery method
Viscous oil recovery
Viscous oil recovery method
Viscous oil recovery method
Water purification with fragmented oil shale
Well completion for injecting high purity oxygen in a fire flood
Well liner segments for in situ petroleum upgrading and...