Inventors:
Richard A. Williams - Savannah NY
Ronald E. Hess - Webster NY
Michael T. Salotti - Ontario NY
John F. Thomasser - Bowmansville NY
Scott M. Huber - Canandaigua NY
Eliott N. Duffney - Rochester NY
Alfonso R. Mancini - Penfield NY
Assignee:
Xerox Corporation - Stamford CT
International Classification:
E21B 4300
Abstract:
Disclosed is a process for removing contaminants from a contaminated area of the subsurface 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 within the perforated riser pipe, wherein a packing is situated in a portion of the annular space between the vacuum extraction pipe and the perforated riser pipe; applying a vacuum to the vacuum extraction pipe to draw gases and liquid from the subsurface into the perforated riser pipe below the packing 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 removing contaminants from at least one of the liquid stream and the gaseous stream. Also disclosed is an apparatus for carrying out the disclosed process.
