Sodium Chloride 1 (NaCl) : Commonly known as salt. Salt may be present in the drilling fluid as a contaminant or may be added for any of several reasons. See Salt. (Bul D11)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}