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DRILLING LOST CIRCULATION MATERIAL

  • US 20100152070A1
  • Filed: 12/07/2009
  • Published: 06/17/2010
  • Est. Priority Date: 12/11/2008
  • Status: Abandoned Application
First Claim
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1. A composition for reducing lost circulation in a well comprising a mixture of coarse particles having an average particle size of from 300 to 1200 μ

  • m, medium particles having an average particle size of from 20 to 150 μ

    m and optionally fine particles having an average particle size of from 5 to 15 μ

    m, and a blend of long fibers having an average length of from 8 to 15 mm and short fibers having an average length of from 1 to 8 mm.

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