Subsea flowline and foundation design
Offshore energy operator
Hydrodynamics, geotechnical engineering and structural design for a subsea flowline system.
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Risers, hoses & cables
Engineering for risers, flexible hoses, umbilicals and power cables. We connect configuration design, dynamic response, seabed interaction and installation requirements, from early studies to detailed design.
Risers · Flexible hoses · Umbilicals · Dynamic cables · Inter-array cables
Configuration and response
- Static and dynamic analysis of risers, hoses, umbilicals and cables.
- Lazy-wave, steep-wave, lazy-S and other suspended configurations.
- Extreme and fatigue assessment, vortex-induced vibration (VIV), wake effects and interference.
Seabed interaction
- On-bottom stability assessments and hydrodynamic loading.
- Soil interaction, free-span assessment and route constraints.
- Trenching operation assessment and equipment selection.
Hoses and terminals
- Seawater intake hoses, loading systems and marine terminal configurations.
- OCIMF / GMPHOM and API 17K expertise for hose design and specification.
- System interfaces, flange selection and hardware definition.
Packages and installation
- Technical specifications, vendor evaluation and manufacturing follow-up.
- Installation analysis, procedures and interface management.
- Factory and site acceptance testing support.
Typical deliverables
- Configuration and analysis reports
- Fatigue, VIV and interference assessments
- Stability and free-span assessments
- Technical specifications and installation procedures
Connected expertise
Planning your engineering scope
Can you assess both the installed system and its installation?
Yes. Our scope includes static and dynamic response, seabed stability and free spans, as well as installation configurations, vessel interfaces and operational procedures.
Which systems do you work on?
Our expertise covers risers, umbilicals, power cables and flexible hoses, including marine terminals and seawater intake systems. Pipeline and seabed structure scopes are developed through our Pipelines & Subsea Infrastructure expertise.
Related project experience
Offshore wind cable stability assessment
Marine engineering consultancy
On-bottom stability analysis for a wind farm power cable.
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CALM buoy mooring and subsea renewal
International marine contractor
Engineering support for SURF and mooring line change-out operations.
View projectWork with Nautilus
Discuss your projectDiscuss your risers, hoses & cables scope.
Tell us about the engineering challenge, the location and your schedule. We’ll connect your enquiry with the right people.