E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 43/00 (2006.01) B09C 1/00 (2006.01) E21B 43/12 (2006.01) E21B 43/24 (2006.01)
Patent
CA 2053446
Disclosed is a process for removing contaminants from a contaminated area of the ground having a vadose zone and a water table which comprises providing a borehole in the contaminated area; placing in the borehole a perforated riser pipe inside of which is situated a vacuum extraction pipe with an opening situated near, at, or at any point below the water table within the perforated riser pipe; while introducing a gas into the riser pipe, applying a vacuum to the vacuum extraction pipe to draw gases and liquid from the soil into the perforated riser pipe and from the riser pipe into the vacuum extraction pipe and transport both the gases and the liquid to the surface as a common stream; forming from the common stream a stream which is primarily liquid and a stream which is primarily gaseous; and separately treating the separated liquid and gas streams. Also disclosed is an apparatus for carrying out the process.
Hajali Paris A.
Revely William F. III
Sim & Mcburney
Xerox Corporation
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