Calcium Hardness – Water Based Mud Testing
The Calcium test gives an indication of the level of soluble Calcium ions present in the mud.
Such ions are considered detrimental since, under conditions of high pH (>11.5), they may render polymer treatments for viscosity and fluid loss less effective.
High levels of Calcium will also flocculate Bentonite.
The total hardness should be controlled below 400 mg/L and must not be allowed to rise above 600 mg/L.
Calculations and Reporting
Calcium Hardness is usually expressed in mg/l CaCo3.