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COMPOSITIONS AND METHODS FOR INHIBITING LOST CIRCULATION DURING WELL OPERATION

  • US 20100230164A1
  • Filed: 06/30/2009
  • Published: 09/16/2010
  • Est. Priority Date: 03/12/2009
  • Status: Abandoned Application
First Claim
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1. A drilling fluid additive for reducing circulation loss during drilling operations comprising ground pumice, barium, anthracite or dolomite having an average particle size between 100 and 4000 microns.

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