Calcium Hardness – Water Based Mud Testing

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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.

Sources of Error

Can be difficult to see the end point of the test.

Calcium hardness can also be reported as mg/L CaCO3. Multiply this value by 2.5 to get the required value.

Comments  

#1 Abdalqadr 2015-09-03 07:08
Gents

If it is not allowed to let calcium increase more than 600mg/l ?? but in salt saturated mud it is about 1600mg/l??????? ? How does that happen . please i need more details about the effect of calcium in drilling mud


Best Regards
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