(n). Drilling Fluids. A visible sign of a chemical reaction. Examples include a color change, a voltage or pH reading or an inflection point on a graphical plot of the data. See: chromate salt, endpoint, titration
Schlumberger Ltd. (The World's Leading Supplier Of Technology, Integrated Project Management And Information Solutions to Customers Working in The Oil and Gas Industry Worldwide), Schlumberger Oilfield Glossary Cedex, France 2014. http://www.glossary.oilfield.slb.com/en/Terms/sym/ a.aspx, (Ergo - Brit) {766}