Method and apparatus for forming an insulated oil well casing

Method and apparatus for heating a wellbore

Method and apparatus for producing viscous or waxy crude oils

Method and apparatus for steam generation at the bottom of a wel

Method and apparatus for subterranean thermal conditioning

Method and apparatus for treating subsurface boreholes

Method and apparatus for viscosity reduction of clogging hydroca

Method and system for introducing electric current into a well

Methods and systems for producing fluid from an in situ...

Mineral well heating systems

Multistage gas generator

Oil recovery well paraffin elimination means

Oil-well installation fitted with a bottom-well electric pump

Parallel heater system for subsurface formations

Portable down hole tool

Power sources for downhole electrical heating

Production in frigid environments

Protective device for RF applicator in in-situ oil shale retorti

Reducing the energy requirements for the production of heavy...

Resistive down hole heating tool