Ammonium Bisulfite Oxygen Scavenger for Drilling Fluids
CAS Number: 10192-30-0
Ammonium bisulfite is a fast-reacting oxygen scavenger used to remove dissolved oxygen from drilling fluids, completion fluids, and workover brines, preventing oxygen-induced corrosion of drill string, casing, and downhole equipment. It reacts stoichiometrically with dissolved O₂ to form ammonium sulfate, achieving oxygen levels below 20 ppb within minutes. Supplied as a concentrated aqueous solution for easy injection.
Technical Specifications
| appearance | Clear colorless to pale yellow solution |
| pH (1% solution) | 4.0–5.5 |
| active content (%) | ≥60 |
| density (g/cm³, 20°C) | 1.30–1.35 |
| O₂ scavenging speed (ppb O₂ residual at 5 min) | ≤20 |
Applications
- Drilling fluid dissolved oxygen removal
- Completion brine oxygen scavenging
- Workover fluid oxygen control
- Produced water injection oxygen removal
- Water injection well dissolved oxygen treatment
Key Features
- Rapid stoichiometric oxygen removal without catalyst
- Suitable for drilling fluids, completion brines, and workover fluids
- Non-corrosive reaction products — no residual contamination
- Liquid form for direct injection without dissolution step
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