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Composition for use in sealing a porous subterranean formation, and methods of making and using

  • US 20030104949A1
  • Filed: 12/03/2002
  • Published: 06/05/2003
  • Est. Priority Date: 12/03/2001
  • Status: Active Grant
First Claim
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1. A composition for use in sealing a porous subterranean formation comprising a mixture of effective amounts of water swellable clay and a water-insoluble, water-absorbent, water-swellable polymer, both having an external coating consisting of an effective amount of a material capable of retarding the rate of penetration of water through the coating.

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