Surface driven well pump

Surface flow controlled valve and screen

Surface gas evaluation during controlled pressure drilling

Surface mining

Surface modification for cross-linking or breaking...

Surface read-out tester valve and probe

Surface real-time processing of downhole data

Surface-actuated release tool for submersible pump...

Surface-assisted continuous underground mining

Surface-modifying agents for wettability modification

Surfactant additive for oilfield acidizing

Surfactant additive for oilfield acidizing

Surfactant amendments for the stimulation of biogenic gas...

Surfactant blends for aqueous solutions useful for improving...

Surfactant composition

Surfactant composition and process for the production of oil...

Surfactant composition and process for the production of oil...

Surfactant compositions for well cleaning

Surfactant compositions useful in enhanced oil recovery...

Surfactant compounds and their preparation