One team

Subsea Integration Alliance brings two leading industry performers together as one team.

Technology portfolio

Leading subsea technology portfolio

Subsea Integration Alliance has access to one of the broadest portfolios in subsea, comprising market-leading technologies. Working as an alliance allows us to standardise and optimise systems across the technology portfolio.

Powered production systems

Relying solely on reservoir drive means that pressure, productivity and recovery all decline at a faster rate than necessary.

Designed and engineered for the unique challenges posed by specific subsea applications, OneSubsea powered production systems help you achieve full asset potential.

At the core of powered production systems is OneSubsea’s industry-leading single-phase boosting pump, multiphase boosting pump, and multiphase compressor. From the heavy oil fields of the Republic of Congo to the uncompromising Australian brownfields, we deliver significant investment returns and operational improvement on a global stage.

Subsea production systems

OneSubsea provides fully integrated subsea production systems, incorporating field-proven technology and products.

Decades of experience and engineering innovation have helped to ensure that our product range – from wellheads and trees, to manifolds and flowline connectors, to production controls and workover systems – drives technically superior field development solutions. From deepwater to ultradeep water, from greenfield to brownfield, OneSubsea delivers the right solution for any challenge.

Standard configurable systems

OneSubsea delivers capital-efficient, pre-engineered standard configurable systems. Each system is fully qualified and adequately documented to provide customers with the details to align with our technical specifications. Project tenders are streamlined and OneSubsea is able to engineer, manufacture, and deliver system solutions globally as soon as 12 months after contract award. Our standard configurable systems include subsea trees, manifolds, controls, connection systems, and wellheads.


Our trees provide reliable operations in all environments, from shallow to ultra- deepwater. The monitoring and feedback capabilities of OneSubsea trees reduce operator risk and provide data and communication for operations management.

OneSubsea manifolds are designed and developed based on more than four decades of applied subsea experience. With a variety of manifold types installed in water depths up to 10,000 ft, pressures up to 15,000 psi, and temperatures up to 350 degF [177 degC], our manifolds are available in all material, pressure, and temperature classes. 

Since 1999, OneSubsea has designed and delivered more than 1,000 subsea control modules to more than 50 projects worldwide. Our control systems use field-proven, robust, and reliable technology, providing the versatility and flexibility that your project requires to achieve maximum efficiency and reduce opex through minimised interventions and significantly reduced deferred production.

Flowline systems

High performance and cost-efficient Flowline Systems to enable optimal field architecture.

The Subsea 7 flowline portfolio encompasses the full range of cross section and material solutions, from simple corrosion coated flowlines, to wet insulation, Pipe-in-Pipe, active heated systems, and internal PE coated systems. Our Electrically Heat Traced Flowline pipe technology advances help manage flow assurance, to overcome the challenges of longer distance tiebacks and greater water depths, cost-effectively.

Pipeline bundles

Subsea 7’s track record includes the successful design, fabrication and installation of over 80 pipeline bundles around the world.

The Pipeline Bundle neatly incorporates all structures, valve work, pipelines and control systems necessary to operate a field in one single product, delivering considerable value and potential cost savings for a wide range of applications, including HPHT field developments.

Riser systems

By taking into account field characteristics such as water depth and environmental conditions our riser systems meet the ever-increasing challenges of deepwater and harsh environments.

Subsea 7’s riser portfolio includes decoupled riser systems such as the Single Hybrid Riser, the Hybrid Riser Tower and the Buoyancy-Supported Riser – successfully proven in major deepwater projects. Coupled riser systems include Flexibles, Steel Catenary Risers and Steel Lazy-Wave Risers, including the first SLWR system deployment on Brazil’s BC-10 project.


A diverse fleet and strategically positioned global assets.


Subsea 7 has one of the most capable and diverse fleets of vessels in our market segment. Modern and versatile, our fleet includes chartered and high-specification owned vessels. By balancing operational flexibility while retaining full control of the capabilities, we differentiate our services from the rest of the market.

Our offshore operations are managed, crewed and operated by some of the most experienced onshore and offshore marine and construction personnel in the industry. With the flexibility to respond quickly and sensitively to customer demands, we can leverage the full strength of our global resources and know-how.

Onshore operations

Onshore, our global operations include an extensive infrastructure of pipeline spoolbases, fabrication and operations support yards. These strategically positioned assets, along with a network of local partners, are central to our objective of developing strong and sustainable local businesses.


Our fleet of remotely operated underwater vehicles (ROVs) is one of the largest and most advanced in the world, ranging from compact observation-class units to purpose-built drill support vehicles and heavy-duty construction-class systems.

Total Lifecycle Solutions

Improving productivity, maintaining availability.

To maximise lifelong value, we provide customers with solutions that optimise the overall performance and returns from their subsea asset. Our total lifecycle approach begins with early engagement to ensure optimal economic performance and is delivered through our project execution and technology portfolio and supported throughout the life of field by leading aftermarket capabilities.

Our combined capabilities allow customers to maximise recovery rates, achieve the highest levels of uptime and availability and maintain asset health in the most efficient manner.

Improving productivity

  • Monitoring and control
  • Analytics and insight
  • Connected systems
  • Future-ready solutions

Maintaining availability

  • Operational systems
  • Asset integrity and monitoring services
  • Inspection systems
  • Autonomous vehicles
  • Remote intervention and repair systems
  • Fluid intervention systems
  • Digitalisation – monitoring and optimisation