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Colloidal and colloidal-like systems in aqueous, clay-based fluids

  • US 7,199,085 B2
  • Filed: 05/06/2004
  • Issued: 04/03/2007
  • Est. Priority Date: 05/06/2003
  • Status: Expired due to Fees
First Claim
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1. A fluid composition for downhole use in a well, comprising:

  • an aqueous liquid as the continuous phase;

    one or more surfactants;

    aphrons; and

    one or more viscosifiers selected from the group of palygorskite-sepiolite clay family members consisting of palygorskite, tuperssuatsiaite, yofortierite, kalifersite, sepiolite, falcondoite, loughlinite and mixtures thereof, wherein the composition has a pH of from about 7 to about 12.

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