Upgrading and mining of coal

Upgrading and recovery of heavy crude oils and natural...

Upper beam for a telescopic feeder, telescopic feeder and...

Uppers plug

Uranium extraction from underground deposits

Uranium solution mining process

Uranium solution mining using potassium-containing solutions

Usage of oil facilities waste sludge and fine tailings water...

Use of a chopper mechanism to add fibers to a well

Use of a gas-driven foam bank in a secondary recovery process

Use of a heavy petroleum fraction as a drive fluid in the...

Use of a high purity imidazoline based amphoacetate...

Use of a solvent-external emulsion for in situ oil recovery

Use of alkanesulphonic acids as asphaltene dispersants

Use of aqueous dispersions for tertiary petroleum production

Use of axial accelerometer for estimation of instantaneous...

Use of ball sealers in co.sub.2 or steam injection wells

Use of barite in perforating devices

Use of c02/steam to enhance steam floods in horizontal...

Use of chlorous acid in oil recovery