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Soda ash is the common name for sodium carbonate (Na2CO3). It is a weak base that is soluble in water and dissociates into sodium (Na) and carbonate (CO3) ions in solution.

Calcium is present in many makeup waters and formations. It can cause flocculation of the mud, resulting in increased rheology, gel strengths, and fluid loss. 

High-filtrate calcium causes precipitation of calcium-sensitive additives, such as POLY-PLUS high-molecular-weight liquid clay inhibitors and RINGFREE polymeric thinners, which are the most sensitive. 

Cellulosic polymers are only slightly calcium-sensitive and tolerate moderate levels of filtrate calcium.
Features
  • Widely available and economical source of carbonate ions to precipitate calcium while increasing pH 
  • Concentrate chemical; effectively removes calcium in most drilling fluids at small treatment levels

Specifications

Physical Appearance

  • White Powder

Specific Gravity

  • 2.51

pH

  • 11.4

Solubility in Water

  • 572° F [300° C]
  • 51 g/100 mL at 86° F [30° C]

  • Reduce Soluble Calcium in Waterbased Muds 
  • Increase pH 
  • Flocculate Spud Muds
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