Stability

What are subsea stability solutions used for?
- Seabed stability solutions help control the position and movement of subsea cables, umbilicals and flowlines, reducing unwanted movement and associated stresses or damage.
Why is seabed stability important?
- Subsea lines can experience movement from currents, thermal expansion and contraction, seabed geometry and other operating conditions. Managing this movement can help maintain the required line configuration and reduce excessive loading.
What types of seabed stability solutions are available?
- Solutions include ballast systems that add submerged weight and motion stabilisation systems that interact with the seabed to increase resistance to lateral or axial movement.
What are motion stabilisers used for?
- Motion stabilisers are designed to mitigate axial and lateral instability in subsea cables, umbilicals and flowlines. Their helical fins embed into the seabed to increase resistance to movement.
What are ballast modules used for?
- Ballast modules add submerged weight to subsea lines to increase bottom stability or, in dynamic applications, help create the required line profile.
What is the difference between ballast and motion stabilisation?
- Ballast primarily increases the submerged weight of a line, while motion stabilisation increases resistance to movement through interaction with the seabed. The appropriate approach depends on the application and stability requirements.
Can stability solutions be used for both cables and pipelines?
- Yes. Depending on the solution, seabed stability technologies can be applied to subsea cables, umbilicals, flexible and rigid pipelines and flowlines.
Can stability solutions be customised for specific seabed conditions?
- Yes. Solutions can be engineered around line characteristics, seabed soil conditions, environmental loading, required resistance, water depth and installation requirements. Motion Stabilisers, for example, use custom-designed helical fins to suit different soil conditions.

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Stability

Managing subsea stability and movement

Solutions for controlling the movement and position of subsea cables, umbilicals and flowlines on the seabed. From adding weight to increase stability to resisting lateral and axial movement, solutions are configured around the specific requirements of each application.

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Stability benefits

Controlling movement for reliable subsea performance

Solutions combine engineered ballast and motion stabilisation technologies to manage line movement, seabed interaction and stability across demanding offshore environments.

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Control unwanted movement

Solutions help manage lateral and axial movement caused by currents, thermal expansion, seabed conditions and other operational factors, helping reduce unwanted line movement.

Control seabed stability

Ballast and stabilisation systems help maintain the required position and configuration of subsea lines, supporting reliable operation throughout the project lifecycle.

Customised design

Solutions can be configured around line characteristics, seabed conditions, loading requirements and installation methods to provide the required level of stability.

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