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MODIFIED CARBON BLACK FOR OILFIELD FLUIDS

  • US 20170096593A1
  • Filed: 03/26/2015
  • Published: 04/06/2017
  • Est. Priority Date: 03/28/2014
  • Status: Active Grant
First Claim
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1. An organic drilling fluid comprising:

  • an invert emulsion including a continuous organic phase and an emulsified aqueous phase;

    a surface treated carbon black having a OAN structure of greater than 150 mL/100 g by ASTM D2414 and a BET surface area of less than 500 m2/g dispersed in the invert emulsion at a concentration of at least 0.5% by weight; and

    wherein the conductive organic drilling fluid has a volume resistivity of either a) less than 105 ohm-m or b) at least a factor of 100 less than the resistivity of the organic phase in the absence of the surface treated carbon black.

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