Inventor
THIGPEN DAVID R
US5 patents
Patents
5 patentsUS5068043ANov 26, 1991
Preformed surfactant-optimized aqueous alkaline flood
SHELL OIL CO82 citations95
US4502541AMar 5, 1985
Staged preformed-surfactant-optimized aqueous alkaline flood
SHELL OIL CO21 citations80
US4493371AJan 15, 1985
Recovering oil by injecting aqueous alkali, cosurfactant and gas
SHELL OIL CO19 citations71
US4279305AJul 21, 1981
Process for stimulating a well with a saline surfactant sulfate, alkanol and acid system
SHELL OIL CO7 citations71
US5223153AJun 29, 1993
Iron hydroxide removal method
SHELL OIL CO6 citations61