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Flushing fluid for centrifugal pumps used in the pipelining of slurries

  • US 4,239,422 A
  • Filed: 10/04/1979
  • Issued: 12/16/1980
  • Est. Priority Date: 10/04/1979
  • Status: Expired due to Term
First Claim
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1. In a method for transporting an aqueous slurry of particulate solids in a pipeline wherein said aqueous slurry has an effective viscosity greater than water and is pumped through said pipeline by at least one centrifugal pump wherein a flushing fluid is used to maintain the bearing surfaces in said centrifugal pump substantially free of said particulate solids, the improvement comprising:

  • the use of a thickened aqueous flushing fluid, said thickened aqueous flushing fluid consisting essentially of an aqueous solution and a thickening agent in an amount sufficient to increase the viscosity of said thickened aqueous flushing fluid to at least about 80 percent of the viscosity of said aqueous slurry.

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