pH – Water Based Mud Testing
pH control is important with all water based mud systems to ensure proper functioning of chemical additives and to limit the potential for corrosion.
pH must be maintained within the range specified in the drilling fluids programme.
Use of a calibrated pH meter is the preferred method of measurement.
Good quality pH paper, accurate to ± 0.5, may be used as a temporary solution.
Must be reported to a minimum accuracy of ± 0.5 (paper) or +/- 0.1 (meter).
Sources of Error