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CABLE PROTECTION FEATURE


PIPESHIELD INTERNATIONAL LTD PIPELINE & CABLE PROTECTION SPECIALIST


EXPERIENCE AND KNOWLEDGE Pipeshield® is a well known world leader in subsea pipeline protection and a highly reputable brand in the offshore oil and gas arena. They are also a leading source of knowledge on cable protection and scour prevention and protection within renewables.


UNIQUE CHALLENGES Cable protection has the same issues as pipelines, but also some unique challenges, especially where the cables are laid adjacent to the mono-piles of wind turbines where enhanced near seabed velocities bring issues of scour as well as ensuring stability to the cables.


Headquartered in Lowestoft, the company maintains manufacturing bases in England and Scotland and has established a permanent manufacturing arrangement in South East Asia and production experience in the Middle East, Indonesia, Canada and South Africa.


BESPOKE SOLUTIONS


Pipeshield have been working with some of the biggest companies in this arena to develop bespoke solutions to one of the most prolific problems renewable energy has to resolve subsea. They have provided mattresses on the Lynn Inner Dowsing, Gwynt Y Mor, Scroby Sands and Egmond Windpark projects.


CONCRETE MATTRESSES Concrete mattresses provide both scour prevention, stabilisation and protection and the flexible nature of the block form ensures that the seabed and cable contours are closely followed. In the event of any localised scouring around the edge of the mattress then blocks will settle into the hole to prevent undercutting.


To enhance the scour protection a frond system can be fitted to the mattresses prior to deployment and then activated post installation. In the right conditions the fronds will attract up to 1m of sediment over and around the mattress providing enhanced stability and impact protection.


CERTIFICATION Pipeshield is approved to ISO 9001:2008, 14001:2004, ISO 18001, and is a supplier member to FPAL and has achieved the VERIFY status for its quality systems.


CASE STUDY - LYNN INNER DOWSING This project required stabilisation and protection of the inter turbine cabling. To optimise the mattress requirement calculations were performed to optimise both the number and size of the mattresses to fit in with the installation logistics.


Deck space is always at a premium and therefore it was important to keep the total volume of mattresses to a minimum thus to ensure stability mattresses using a high density concrete were used to keep the thickness down.


Installation used the in house designed frames that can be operated either by diver, ROV or by remotely activated hydraulic operation. In this case the installer used an ROV to position and release the mattresses over the cable.


Pipeshield International www.pipeshield.com


e = See enhanced entry online


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www.windenergynetwork.co.uk


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