wind energy hamburg 2018 - subsea uk

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Wind Energy Hamburg 2018

Practical Engineering to Mitigate

Subsea Power Cable RisksSubsea UK 26.09.2018

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Who and where?

bpp@bpp-cables.com

bpp-cables.com

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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