For making compositions and the method for heavy brine thickening

For making compositions and the method for heavy brine thickening

  • CN 101,305,067 B
  • Filed: 11/06/2006
  • Issued: 12/14/2016
  • Est. Priority Date: 11/16/2005
  • Status: Active Grant
First Claim
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1. the method preparing workover treatment liquid, the method includes:

  • by salt that density is at least 11.5 lbs/gal and sun fromSubtype polysaccharide contacts, thus by this brines, wherein said cationic polysaccharide is cation guar gum, wherein described thickChanging step, described salt only contacts with described cation guar gum, and wherein said salt comprises;

    zinc salt, and this zinc salt selects free chlorineChange zinc, zinc bromide, zinc iodide, zinc sulfate and the group of their mixture composition;

    And/or calcium salt, this calcium salt selects free chlorinationCalcium, calcium bromide, calcium iodide and the group of their mixture composition, and wherein contain the described workover treatment liquid of described saltViscosity be that 200 centipoises are to 15000 centipoises.

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