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Anti-bit balling drilling fluids, and methods of making and use thereof

  • US 10,266,745 B2
  • Filed: 04/12/2017
  • Issued: 04/23/2019
  • Est. Priority Date: 02/03/2017
  • Status: Active Grant
First Claim
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1. A drilling fluid consisting of:

  • from 28 to 850 lb/bbl water based on the total weight of the drilling fluid;

    from 28 to 720 lb/bbl of a clay-based component based on the total weight of the drilling fluid;

    from 0.02 to 180 lb/bbl of a surfactant based on the total weight of the drilling fluid, the surfactant consisting of Formula (I);


    R—

    (OC2H4)x

    OH 



    Formula (I)where R is a hydrocarbyl group having from 10 to 20 carbon atoms,x is an integer from 1 and 10; and

    optionally one or more additives selected from the group consisting of weighting agents, dispersants, pH buffers, electrolytes, glycols, glycerols, dispersion aids, corrosion inhibitors, defoamers, starches, xanthan gum polymers, and combinations thereof, where the drilling fluid has an accretion percentage of less than or equal to 15%.

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