Water swellable polymers as lost circulation control agents material

Water swellable polymers as lost circulation control agents material

  • CN 101,263,211 B
  • Filed: 07/11/2006
  • Issued: 04/15/2015
  • Est. Priority Date: 07/13/2005
  • Status: Active Grant
First Claim
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1. safeguard a method for the well bore of earth penetrating, it comprises:

  • The sealant comprising inverse emulsion polymer is inserted in well bore, be reduced in described well bore mid-enter fluid loss in stratum during fluid, wherein said inverse emulsion polymer is dehydrated before inserting in well bore,Wherein said inverse emulsion polymer comprises with the oil of the total weight 10-80 % by weight of this inverse emulsion polymer,Wherein said inverse emulsion polymer comprises water-swellable polymer, andWherein said inverse emulsion polymer comprises with the water of the total weight 0-70 % by weight of this inverse emulsion polymer;

    AndWherein said inverse emulsion polymer comprises with the water-swellable polymer of the total weight 5-100 % by weight of this inverse emulsion polymer;

    WithWherein said inverse emulsion polymer is dehydrated to the water containing 0-10 % by weight.

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