Subterranean magnetic field protective shield

Subterranean permeability modification by using microbial polysa

Subterranean remediation pump and process for use

Subterranean rotation-inducing device and method

Subterranean treatment fluids and methods of using these...

Subterranean treatment fluids comprising viscoelastic...

Subterranean treatment fluids with enhanced particulate...

Subterranean treatment fluids, friction reducing copolymers,...

Subterranean treatment fluids, friction reducing copolymers,...

Subterranean well anchoring apparatus

Subterranean well completion apparatus with flow assurance...

Subterranean well completion incorporating downhole-parkable...

Subterranean well secondary plugging tool for repair of a...

Subterranean zone sealing methods and compositions

Sucker rod back off tool

Suction of gases from boreholes in coal mining

Sulfomethylated lignite salt as a sacrifical agent in oil recove

Sulfomethylated lignosulfonates as additives in oil recovery pro

Sulfomethylated lignosulfonates as additives in oil recovery pro

Sulfonate-cosurfactant mixtures for use in hard brines during oi