pH test

{
  "id": "MLC-T-OAG-002767",
  "term": "pH test",
  "field": "Oil and gas",
  "definition": "The measurement of the acidity or alkalinity of a drilling fluid, made either with pH paper for a rough value or with a glass-electrode meter calibrated against buffers for an accurate one. API Recommended Practice 13B-1 gives the procedure for water-based muds, where pH is held at roughly 9 to 11 to limit corrosion and clay swelling. Oil-base muds are not tested for pH, because their continuous phase is not aqueous, and alkalinity is determined by titration instead.",
  "subject": "Drilling Fluids",
  "url": "https://mlchart.com/terminology/oil-and-gas/ph-test/"
}