Oil recovery using steam-chemical drive fluids

Oil recovery utilizing highly oxyalkylated phenolic resins

Oil recovery with dilute surfactant systems

Oil recovery with water containing carbonate salt and co

Oil reservoir permeability control using polymeric gels

Oil sand spiral surface mining apparatus

Oil sands mining

Oil secondary recovery

Oil separation and pumping system and apparatus

Oil shale mining machine

Oil well and method for production of oil

Oil well blow-out preventer

Oil well blow-out preventer and sealing device

Oil well bore hole filter cake breaker fluid test apparatus...

Oil well casing and tubing joint and production of same

Oil well casing cementing receiver and plug

Oil well completion tool having severable tubing string...

Oil well derrick substructure with carriage for blowout...

Oil well derrick with guide track for travelling block dolly

Oil well device