Method and apparatus for enhancing multiphase extraction of...

Details Method and apparatus for enhancing multiphase extraction of... Method and apparatus for enhancing multiphase extraction of...

E - Fixed Constructions

21

B

E21B 43/18 (2006.01)

Patent

CA 2733042

A method is taught for applying vacuum pulses to enhance multiphase vacuum extraction of vapours and liquids from contaminated subsurface wells. The method involves first initiating continuous multiphase vacuum extraction from the subsurface well. Then one or more short vacuum pulses are imparted to the subsurface environment, to momentarily interrupt flow of vapours and liquids in the subsurface well. Time is allowed for a vacuum to build up in the extraction apparatus; and then the vacuum build up is rapidly released to momentarily increase velocity of vapours and liquids being extracted from the subsurface well. A device is further taught for imparting vacuum pulses to enhance multiphase extraction from contaminated subsurface wells, comprising a vacuum pulse tool having an inlet in fluid communication with the subsurface well and an outlet and one or more multiphase extraction vacuum pumps, connected to the outlet of the vacuum pulse tool.

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