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Downhole chemical delivery system for oil and gas wells

  • US 6,279,656 B1
  • Filed: 11/03/1999
  • Issued: 08/28/2001
  • Est. Priority Date: 11/03/1999
  • Status: Expired due to Fees
First Claim
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1. An apparatus for treating wells comprising:

  • a) a material useful for treating wells; and

    b) a water-soluble shell substantially encasing the material, said shell comprising a water-soluble polymer and a cross-linking agent, wherein at least a portion of the water-soluble polymer is cross-linked with the proviso that the cross-linking agent is not a chromic carboxylate complex.

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  • 5 Assignments
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