Sulfonation of crude oils to produce petroleum sulfonates

Sulfur deposition reduction

Super-yield bentonite base drilling fluid

Surface active compound, a microemulsion containing said compoun

Surfactant and process for enhanced oil recovery

Surfactant and process for enhanced oil recovery

Surfactant composition

Surfactant composition

Surfactant composition containing alkylated biphenylyl phenyl et

Surfactant compositions for steamfloods

Surfactant compositions useful in enhanced oil recovery processe

Surfactant compositions useful in enhanced oil recovery processe

Surfactant enhanced injectivity of xanthan mobility control solu

Surfactant flooding oil recovery process

Surfactant flooding oil recovery process

Surfactant flooding oil recovery process

Surfactant flooding solution

Surfactant flooding solutions with sulfonated creosote

Surfactant fluid suitable for use in waterflood oil recovery met

Surfactant oil recovery process usable in high temperature forma