Electric resistance heating devices – Heating devices – Fluid-in-circuit type heater
Patent
1992-02-05
1996-12-17
Jeffery, John A.
Electric resistance heating devices
Heating devices
Fluid-in-circuit type heater
392311, 392301, 166248, 405131, E21B 4300
Patent
active
055862136
ABSTRACT:
Ionic contact is established and maintained between electrodes and soil in ohmic heating of a subsurface formation for recovery of volatile and semi-volatile materials, such as hazardous waste, hydrocarbon-like materials, and valuable minerals having thermally responsive properties. A compressed, dry sponge is wrapped around an electrode, which is then inserted into a bore hole. A conductive liquid is added to the bore hole, causing the sponge to swell, creating a stable and substantial interface for the flow of heating currents.
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Bridges Jack E.
Dev Harsh
Jambor Richard
Sresty Guggilam C.
IIT Research Institute
Jeffery John A.
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