Method and apparatus for recovery of water-immiscible liquids fr

Wells – Processes – Producing the well

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Details

166 53, 166 66, 166325, 166372, 210104, 210923, 417118, 417138, 417143, E21B 3408, E21B 4312, E21B 4400, F04F 108

Patent

active

046258078

ABSTRACT:
Ground water pollutant floating above the water table in a water-bearing formation is removed through a well penetrating the formation by lowering the water level so that pollutant from the region surrounding the well will flow into the well due to gravitational force, and lowering a liquid-retaining vessel into the well to a depth whereby a liquid entry port in the vessel is in the pollutant layer above the water level. The vessel is constructed to receive the liquid pollutant by gravitational flow through the liquid entry port, the displaced gas leaving through a vent. A compressed air line feeds the vessel to purge its interior of accumulated liquid through an exit port on an intermittent basis. Check valves associated with each port are actuatable by the influence of the compressed air to prevent leakage of discharged pollutant back into the vessel and to provide complete and efficient purging when the compressed air is flowing. The vessel is incorporated into a system of components including a water pump for lowering the water level in the well, a source of compressed air, a pollutant recovery tank, and control circuits for both the compressed air and the water pump.

REFERENCES:
patent: 813322 (1906-02-01), Richards
patent: 2412723 (1946-12-01), Elliott
patent: 3275021 (1966-09-01), Loveless
patent: 3915225 (1975-10-01), Swink
patent: 4273650 (1981-06-01), Solomon
patent: 4345647 (1982-08-01), Carmichael
patent: 4527633 (1985-07-01), McLaughlin et al.
patent: 4546830 (1985-10-01), McLaughlin et al.

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