FEATURE SPONSOR
BEATRICE – THE STORY SO FAR
based site. HDPE pipes were installed behind the TBM to maintain the tunnel integrity and form the cable duct.
UNDERWATER DIVE TEAM On completion of the successful drilling of the first cable duct, a dive team from Underwater Diving Services entered the water using the Launch and Recovery System (LARS) from the deck of the jack-up barge to disconnect the 27m long TBM from the installed pipe and prepare the machine for recovery. The dive team
designs, deck plans and provided the technical support across the marine side of the project. This in-depth involvement across the planning and operational phases continues to highlight the company’s commitment to the highest standards of safety by operating to industry recognised standards and guidelines.
The company operate a large fleet of near shore modular jack- up barges which can support the installation of subsea cable landings,
due to the distances between the offshore cable vessel and the mainland.
The company prides itself in working closely with a broad range of clients in the energy industry across the whole life of marine projects. From early involvement in the planning and initial ground investigation, construction works, emergency repairs, operations and maintenance right through to decommissioning and demolition on projects in the tidal, hydroelectric, nuclear and renewables sectors.
The company prides itself in working closely with a broad range of clients in the energy industry across the whole life of marine projects.
connected the specialist rigging onto the 33t TBM ready for the crane to retrieve it from the seabed. Once the divers were safely back on board the jack-up barge, the TBM was carefully lifted onto the deck of a multi-cat vessel and securely sea-fastened to allow it to be safely returned to Buckie harbour.
The TBM was removed from the multi-cat and transported back by road to the land based launch site to commence the second drive for the final cable duct. The whole process was repeated and on completion of the second cable duct, the TBM was retrieved and once again taken back to Buckie harbour for demobilisation.
FINAL WORKS AND SUPPORT Finally works were carried out on site to complete the cable ducts by the dive team before the Haven Seariser 1 was towed back to Buckie Harbour, where all the equipment was demobilised from the deck of the jack- up barge
Red7Marine’s in-house engineering team supplied support throughout the project, supplying detailed jack-up barge leg penetration analysis, floating stability calculations, sea-fastening
offering the option for bespoke deck configurations to suit individual projects. The Haven Seariser 1 supplied for the BOWF, was selected for the job because of its ability to work in shallower water depths and its maximum deck load of 250 tonnes, whilst having the capacity to be elevated in case of adverse weather. Jack-up barges provide safe, stable platforms for heavy marine lifts reducing the dynamic forces involved and are ideally suited to working in the intertidal zone.
EXPERIENCE AND EXPERTISE Red7Marine has carried out construction works on various cable installation schemes around the UK coast and in 2016, assisted the installation of export cables for the Burbo Bank Offshore windfarm. This renewables project focused on extending the existing windfarm by a further 258MW generating enough power for 230,000 homes.
The company also supplied a custom configuration of the Haven Seajack 3 jack-up barge with a cantilevered platform to house the cable chutes and tensioner. The barge was required to be positioned in the intertidal zone to act as an intermediate cable pulling station
CLIENT DEMAND AND SUPPORT DEVELOPMENT Red7Marine’s extensive fleet allows it to support a variety of offshore wind operations and maintenance programmes across the round one and round two sites providing marine access solutions.
Client led demand in the energy and renewables industries has also seen the launch this year of a purpose built monohull barge, the Eurojack 3923. With its 66m legs and a maximum deck load of 800 tonnes, the company can provide cost effective solutions to clients for major marine developments.
Red7Marine
WEBSITE
RENEWABLES PLANT HIRE
www.windenergynetwork.co.uk 27
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