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Castrol’s Liquid Engineers develop high-quality products underpinned by a thorough understanding of subsea operations


Our focus on system reliability drives us to improve and develop new aqueous and synthetic subsea control fluids and other products to meet challenges caused by:

  • deep water, pre-salt and Arctic developments
  • higher operating temperatures and pressure
  • choices between open- and closed-loop system designs
  • choices between aqueous and synthetic products in the system
  • tightening global environmental legislation
  • new technology for subsea processing and other factors

Since launching our subsea control fluids in the early 1980s we have developed strong relationships across the subsea production industry – from operating companies and major engineering contractors to system and component manufacturers. Castrol subsea control fluids operate in over 260 subsea developments in more than 20 countries around the world, with a customer base that includes almost every subsea operator.

We develop, test and analyze how our products and clients’ subsea equipment work together under stringent field conditions, and support every stage of a project, from fluid choice and installation to used fluid analysis, providing regular qualitative performance feedback. Our supply network can deliver wherever our products are needed.

We are happy to discuss product quality, cleanliness and consistency of product formulation, and you can talk to our Technology and Technical experts about:

  • Implementing systems that help increase operational availability
  • Eliminating known failure modes
  • Reducing complexity
  • Improving interface reliability
  • Reducing the probability and the consequences of a failure mode
  • Enabling inspection and monitoring
  • Removing introduced defects before installation
  • Incorporating fault and damage tolerance