Water-based drilling fluids having enhanced fluid loss control

Water-based metal-containing organic phosphate compositions

Water-dispersible hydrophobic thickening agent

Water-dispersible hydrophobic thickening agent

Water-flood surfactant

Water-in-oil microemulsion drilling fluids

Water-soluble copolymer and its preparation

Water-soluble copolymers useful for enhanced oil recovery

Water-soluble polymers and their use as flushing liquid additive

Water-soluble polymers and utilization thereof

Water-wettable drilling mud additives containing uintaite

Waterflood method

Waterflood oil recovery process employing stabilized biopolymers

Waterflooding employing amphoteric surfactants

Waterflooding employing thickened surfactant solutions

Waterflooding method using sulfonates

Waterflooding process employing anionic-nonionic copolymer

Waterflooding process employing cationic-nonionic copolymers

Waterproofing leather and skins

Well acidizing compositions and method