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Water based compositions for sealing subterranean zones and methods

  • US 6,258,757 B1
  • Filed: 03/14/1997
  • Issued: 07/10/2001
  • Est. Priority Date: 03/14/1997
  • Status: Expired due to Term
First Claim
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1. A composition for sealing a subterranean zone to prevent the uncontrolled flow of fluids into or from the zone consisting essentially of:

  • water present in an amount in the range of from about 6% to about 50% by weight of said composition;

    an aqueous rubber latex present in an amount in the range of from about 33% to about 67% by weight of said composition;

    an organophillic clay present in an amount in the range of from about 13% to about 22% by weight of said composition;

    sodium carbonate present in an amount in the range of from about 2.7% to about 4.4% by weight of said composition; and

    a biopolymer present in an amount in the range of from about 0.1% to about 0.2% by weight of said composition.

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