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Composition and method for acidizing wells and equipment without damaging precipitation

  • US 6,534,448 B1
  • Filed: 11/02/2000
  • Issued: 03/18/2003
  • Est. Priority Date: 11/02/2000
  • Status: Expired due to Term
First Claim
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1. An acidizing composition comprising:

  • an aqueous mineral acid solution;

    an electron donor agent selected from the group consisting of hypophosphorous acid and hypophosphorous acid precursors; and

    an electron transfer agent, said electron transfer agent being a source of molybdenum ions, whereby said electron donor agent and said electron transfer agent function together to reduce ferric ion present in said mineral acid solution to ferrous ion.

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