Lime | Schlumberger
Lime is used as a source of calcium and alkalinity in both water and oilbased drilling fluids. Lime, a widely available commercial chemical, is an economical source of calcium (Ca 2+) and hydroxyl ions (OH –).. Drilling fluid appliions for lime include increasing pH, providing excess lime as an alkalinity buffer, flocculating bentonite muds, removing soluble carbonate (CO 3 2–) .