Pumps – Condition responsive control of pump drive motor – Responsive to accumulation of pumped liquid in receiver
Patent
1988-10-11
1991-05-07
Smith, Leonard E.
Pumps
Condition responsive control of pump drive motor
Responsive to accumulation of pumped liquid in receiver
166265, 210104, 417 40, 417392, F04B 2300
Patent
active
050132180
ABSTRACT:
In accordance with the invention, there is provided a method and apparatus for removing hydrocarbons or other lighter than water pollutants from a water table by drilling a well to a depth below the surface of an underground water table; positioning a vessel having a negative buoyancy in fluid in the well; positioning an inlet into the vessel at a location below the surface of hydrocarbons floating on the surface of the water table and above the interface between the upper surface of the water and the lower surface of the hydrocarbon material; establishing a low liquid level in the vessel; establishing a high liquid level in the vessel; positioning the inlet to a pump in the vessel below the low liquid level; energizing the pump to remove liquid from the vessel when fluid reaches the high liquid level and deenergizing the pump when the surface of the liquid reaches the low liquid level but above the pump inlet.
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Scientific Discertation "Three Low Cost Pumping Systems for Hydrocarbon Contaminated Ground Water" by Claude A. J. Schleyer, presented at the Proceedings of Petroleum Hydrocarbons and Organic Chemicals in Ground Water: Prevention, Detection and Restoration--A Conference and Exposition, Nov. 17-19, 1987, published by National Water Well Association, pp. 43-54.
Descriptive brochure--price list--Bennett Sample Pumps Robert Bennett Company.
Sigma Enterprises, Inc.
Smith Leonard E.
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