Sodium Thiosulfate

Other Names: Sulfite-Based Oxygen Scavenger, Dechlorination Agent
Basic Properties: Oxygen Removal, Corrosion Prevention, Water Treatment
Sodium Thiosulfate is a sulfite-based oxygen scavenger used in drilling fluids to remove dissolved oxygen, prevent corrosion, and neutralize chlorine-based contaminants. It is particularly effective in high-oxygen environments, where corrosion risks are elevated.
As an oxygen scavenger, Sodium Thiosulfate reacts with dissolved oxygen, preventing oxidation of metal surfaces and reducing the risk of corrosion in downhole tools and casing.
Additionally, it is commonly used in dechlorination applications, helping to neutralize residual chlorine in treated water sources, ensuring that drilling fluid chemistry remains stable.
pH: Sodium Thiosulfate functions in a neutral to mildly alkaline pH range (7.0 to 9.0), making it compatible with most water-based drilling fluids.
By using Sodium Thiosulfate in drilling operations, operators can prevent oxygen-related corrosion, improve fluid stability, reduce chlorine contamination, and extend equipment life, ensuring long-term drilling efficiency.