Shale Inhibitor



NC-SIL K is an anhydrous potassium silicate powder that inhibits hydration of reactive drill-cuttings before they have a chance to disperse in the active mud system. By keeping the cuttings intact, the efficiency of the solids control equipment is greatly improved.


Appearance White powder
pH 11
Specific Gravity 1.2 - 1.5 g/cm3
Boiling Point 260°C
Flash Point 100°C
Solubility Miscible


  • NC-SIL K is recommended when drilling in reactive shale formations where dispersed fine solids create the need for dilution of the mud system in order to maintain good rheological properties.
  • NC-SIL K can be used in any water-based mud that does not contain high concentrations of calcium and magnesium. The limited solubility of this product allows it to react with drill cuttings and the wellbore surface without a build-up of soluble silicate in the mud, thus avoiding the problems often associated with silicate muds.


NC-SIL K should be added to water-based mud systems at a concentration of 0.25 - 2 lb/bbl.


NC-SIL K is is available in 55 US gallon (208.19 l) drums, palletized as 4 drums per pallet.

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