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Wind Energy Hamburg 2018
Practical Engineering to Mitigate
Subsea Power Cable RisksSubsea UK 26.09.2018
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BPP-Cables Overview
BPP-TECH (Parent)
Specialist Engineering company working in the offshore energy, & insurance industries
▪ Vessel and subsea equipment
▪ Power cables, risers, umbilicals, flexibles and hoses
▪ Delivery Management & QA/QC
▪ Engineering design analysis
▪ Risk & reliability
▪ Mooring assessments
▪ Instrumentation & monitoring
BPP-Cables
Established in 2009 (owned by BPP-TECH and Keppel Offshore & Marine)
London - Houston – Jakarta - Aberdeen – Newcastle
Complementary skill sets brings variety for engineers
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Our specialist areas:
Our specialist areas include:
▪ Reducing project risks & costs
▪ Optimised cable designs & fitness for purpose reviews
▪ Engineering analysis and advice regarding installation / protection / repair
▪ In-depth knowledge of marine & subsea equipment
▪ Engineering and management support services
▪ Whole or part project delivery management
▪ Highly skilled on-site / on-board engineers
▪ Insured risk & forensic failure analysis
Independent perspective
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Offshore Energy Experience since 1980’s
Engineering principles apply across the subsea spectrum…
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Subsea Cable RiskWe can input at any stage of the process
▪ Risks exist throughout the power cable lifecycle
▪ Wide variety of risks and ways in which they can be addressed
▪ Risks are present during
Design of Cables &
Infrastructure
Manufacture & Factory
Acceptance Testing
Packing, transportation
& storage
Installation & burial
ServiceRecovery &
Repair
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Subsea Cable Risk
Planning is key
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Cable Engineering – Tools for the JobBPP-Cables evaluate and optimise cable designs
▪ Constructional reviews
▪ Finite Element for design verification, parametric models, local fatigue and stresses
▪ Global & local including laying, hauling, bending, crushing and side wall pressure calculations
▪ Dynamic, including clashing and extreme loading
▪ Thermal analysis and cable rating calculations
▪ Fatigue and service life assessments
▪ Environmental Impact
▪ Installation methodologies
▪ Mechanical, electrical and environmental testing
Quality toolbox contains selection of tools
Abaqus Ansys BPP-Softcore ETAP OrcaFlex SolidWorks
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Design Tools
Software tools allow cable design engineers to:
▪ Rapidly understand the effect of design changes
▪ Optimise power cable and umbilical designs to:
▪ Extend fatigue life
▪ Expand operational envelopes
▪ Verify feasibility of designs for given conditions
Engineering-led projects for:
cable vibration analysis,
roller impact assessment,
H.V. dynamic cable development…
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Cable Components & Protections SystemsCable Components
▪ Optimise conductors
▪ Electrical insulation
▪ Shielding materials
▪ Water, oil and gas blocking layers
▪ Mechanical protection
▪ Armouring
Protection Systems
The interface of the cable to the
host structure requires protection:
▪ Bend restrictors
▪ Bend limiters
▪ Bend stiffeners
▪ Articulated armour
Added complexities
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Consultancy to aid Decision-making
• Understanding risks
• Minimising those risks
• Improving performance
• Potentially extending operating asset life
Impartial, engineering and experience-based opinions
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During Installation▪ Excessive tension, torque and/or bending
▪ Crushing/crimping
▪ Poor tension control
▪ Looping and kinking during laying
▪ Fatigue during lay suspension
▪ Impact during burial
Prevention is best
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During ServiceIn-service subsea cable failures can be caused by sub-optimal design, installation and/or third party
damage. Typical problems include one or more of the following:
▪ Mechanical damage including wear and fatigue
▪ Overheating
▪ Sub-standard materials/material degradation
▪ Layer separation and instability
▪ Thermo-mechanical movement
▪ Overbending
▪ Crushing
▪ Corrosion
▪ Gassing
▪ Problems with joints, connectors and terminations
▪ Dropped objects / dragged anchors / fishing / trawling
▪ Scour & shifting sandbanks
▪ Extreme weather
▪ Marine life damage
▪ Contact at cable / pipeline crossing locations
▪ Exposure to adverse agents, temperatures and pressure
Some of the above apply to onshore cables
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When it hasn’t gone to plan…
We see things you don’t want to see!
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…and investigate possible causes…
Dissection, Testing and Client Confidentiality
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…and go back a few spaces and we try to find
solutionsIdeally, engage BPP at an early stage of the process
▪ Risks exist throughout the power cable lifecycle
▪ Wide variety of risks and ways in which they can be addressed
▪ Risks are present during
Design of Cables &
Infrastructure
Manufacture & Factory
Acceptance Testing
Packing, transportation
& storage
Installation & burial
ServiceRecovery &
Repair
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Summary
BPP Cable Lifecycle Knowledge
Design and Manufacture – Array and Export
Installation
Protection
Performance
Incidents, Failures and Remedial Actions
Well-placed to support floating offshore wind developments too…
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JIP Launching
O & M focus should include Cables – Array and Export - as key infrastructure elements (alongside Topsides)
Let’s evaluate collected data cleverly and use it to:
Improve Performance & Reduce Downtime
Predict Lifespan & Transfer Knowledge to other Assets
Let’s work together
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Questions?
Thank you
