Alkalinity Control Chemicals
We provide a suite of additives to control alkalinity in water-based and invert emulsion fluids. These agents may increase or decrease the alkalinity within the drilling fluid. Alkalinity agents help provide fluid stability, improve polymer hydration and performance, and treat out contaminants like cement, carbon dioxide, hardness, and H2S encountered in mix waters or while drilling.
Caustic Soda is used to maintain or increase pH. Increasing pH with caustic soda precipitates magnesium (Mg2+) and suppresses calcium (Ca2+) in high-hardness waters such as seawater, reduces corrosion, and neutralizes acid gases such as carbon dioxide (CO2) and hydrogen sulfide (H2S).
Soda ash is the common name for sodium carbonate (Na2CO3). It is a weak base that is soluble in water and dissociates into sodium (Na) and carbonate (CO3) ions in solution. It can cause flocculation of the mud, resulting in increased rheology, gel strengths, and fluid loss
Citric acid is used to reduce pH and remove calcium when drilling cement, to reduce the potential of crosslinking polymers (xanthan and others) from iron, and to prevent fish-eyes when mixing polymers. An organic acid, citric acid is less reactive compared with sulfuric or hydrochloric acid, thereby being somewhat safer to handle.
Lime is used as a source of calcium and alkalinity in both water- and oil-based drilling fluids. Lime, a widely available commercial chemical, is an economical source of calcium (Ca2+) and hydroxyl ions (OH–).
it is used to provide alkalinity control for all water based systems and is compatible with freshwater, brines, and brine polymer systems. it dissolves in water to provide a pH of approximately 10.3. This creates a pH buffer that is safer to use than caustic soda.
It can be used to increase the pH of aqueous systems and can also be used as an alternative to lime for treatment
of carbon dioxide contamination. Its ability to act as a pH buffer results in it increasing the thermal stability of polymers.
Sodium Bicarbonate NaHCO₃
Citric Sodium bicarbonate, a low-pH buffer