Castrol Transaqua HT2 is a high-performance, water-based hydraulic control fluid formulated for subsea production and workover control systems. Designed for conventional and high-pressure, high-temperature applications, it provides reliable operation across topside, subsea, open-water, wellbore and downhole equipment.
Transaqua HT2 is suitable for Electro-Hydraulic Multiplex (EH-Mux) and direct hydraulic control systems. Its applications extend from individual Subsurface Safety Valves (SSSVs) to complex intelligent well completions.
The fluid includes a visual dye and ultraviolet tracer to assist with the rapid detection of subsea leaks, either visually or with compatible ROV-mounted detection equipment.
Key features:
Water-based subsea hydraulic control fluid
Operating temperature range from −30°C to 170°C
Suitable for high-pressure, high-temperature applications
Suitable for EH-Mux and direct hydraulic control systems
Supports topside, subsea, wellbore and downhole applications
Suitable for Subsurface Safety Valves and intelligent well completions
UV leak tracer assists with subsea leak detection
Maintains corrosion protection with seawater contamination
Stable with up to 10% seawater contamination
Compatible with many metals, elastomers and plastics used in subsea systems
Miscible with Castrol Transaqua products and many other water-based subsea control fluids
Qualification testing conducted to ISO 13628-6 Annex C/API 17F requirements
Supplied in a 208-litre plastic drum
Typical properties:
Appearance: clear, mobile fluid
Colour: pale straw
Pour point: −39°C
pH at 20°C: approximately 8.9
Particulate cleanliness: SAE AS4059F Class 6
Do not mix Transaqua HT2 with synthetic control fluids or mineral oils. Confirm compatibility with all project-specific system materials before use. Store sealed drums under cover, away from direct sunlight, at temperatures between −5°C and 45°C. Consult the current Castrol Product Data Sheet and Safety Data Sheet before handling or use.
