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Cleaning labyrinthine system with foamed solvent and pulsed gas

  • US 4,419,141 A
  • Filed: 04/05/1982
  • Issued: 12/06/1983
  • Est. Priority Date: 04/05/1982
  • Status: Expired due to Fees
First Claim
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1. A method of cleaning a viscous substance from a labyrinthine channel system which comprises:

  • a. flushing the system with a liquid solvent for the substance, said solvent being a continuous phase containing discrete bubbles of a suspended gas in a ratio of at least one volume of gas for each three volumes of liquid, andb. injecting additional gas into the system in the form of regular discrete pulses during which pulse time the gaseous phase becomes the continuous phase.

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