Method and apparatus for heating subsurface soil for...

Details Method and apparatus for heating subsurface soil for... Method and apparatus for heating subsurface soil for...

B - Operations, Transporting

09

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B09B 3/00 (2006.01) A01B 79/00 (2006.01) B09C 1/06 (2006.01) C09K 17/00 (2006.01) E02D 3/11 (2006.01) E21B 36/00 (2006.01) E21B 36/02 (2006.01) E21B 43/08 (2006.01) E21B 43/295 (2006.01) E21B 43/30 (2006.01) F23G 7/14 (2006.01)

Patent

CA 2082108

64 METHOD AND APPARATUS FOR HEATING SUBSURFACE SOIL FOR DECONTAMINATION ABSTRACT OF THE DISCLOSURE A technique for in situ decontamination of an earth formation. High gas temperatures can be achieved at subsurface formations by supplying a fuel at a subsurface location, such as at the bottom of a wellbore. Pressurized air or gas preheated to a temperature of about 700°F-1200°F is supplied to the wellbore to ignite the fuel. The combustion heat produced by the fuel further heats the preheated gas to temperatures in the range of 1200°F-4500°, which heated gases are forced out of the borehole into the contaminated formation. Contaminants are thereby volatilized or oxidized and removed from the formation to the surface.

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