Oilfield Glossary

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Note: Definitions provided on this website are for reference purposes only. Engineers and professionals should independently confirm all information using industry standards.

Mud pH meter

The pH meter measures the acidity or alkalinity of the drilling fluid. Most water-based muds are kept alkaline (pH 9-10.5) to control corrosion and activate polymer additives.

A drop in pH can indicate contamination (e.g., from acid gas influx like CO2 or H2S) or bacterial degradation of the mud polymers.

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