Apparatus for hydrocarbon recovery from earth strata

Catalytic combustor having spiral shape

Direct firing downhole steam generator

Downhole recovery system

Downhole steam apparatus

Downhole steam generator and turbopump

Downhole steam generator using low pressure fuel and air supply

Downhole steam generator with improved preheating, combustion an

Downhole steam injector

Downhole vapor generator and method of operation

Emission controller for indirect fired downhole steam generators

Flameless combustor

High pressure combustor having a catalytic air preheater

Jet engine pump and downhole heater

Low pressure combustor for generating steam downhole

Method and apparatus for producing viscous or waxy crude oils

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

Multistage gas generator