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Pipe Bundle At Subsea 7 At Wester

1st April 2013

Photograph of Pipe Bundle At Subsea 7 At Wester

A pipeline for Elf Exploration UK Limited in the West Franklin Field is well underway at Subsea 7 site at Wester in Caithness.

A one off pipeline bundle 6.24km long due to be completed in November 2013. The Subsea 7 work scope involves the engineering, design, procurement, fabrication, installation and pre-commissioning of a pipeline bundle and umbilical between the new West Franklin Wellhead Platform and the existing Elgin Field facilities in the Central Graben Area of the North Sea.

Subsea 7 has in the past few years been successful in gaining many new contracts for Pipeline bundles but in addition has new work in wind related activities that will be seen from Caithness.

Subsea 7 has signed an alliance agreement with Scottish and Southern Energy (SSE) to work with SSE and other partners to develop and execute their future offshore wind developments.

The purpose of the alliance is to work together in a collaborative arrangement to secure a substantial reduction in the cost of delivered power from offshore wind farms.
The alliance partners include:
Developer - SSE - a large UK utility company and one of the three largest European offshore wind
developers with a portfolio of over 5,500MW of projects
Turbines - Siemens Wind - a market leader in offshore wind turbines
Electrical systems - Siemens Transmission and Distribution - a market leader in offshore transmission and distribution systems
Foundation Design - Atkins
Fabrication - Burntisland Fabrications
Marine operations and offshore installation - Subsea 7.
Included in Subsea 7s scope:
Installation of array and export cables
Foundation installation
Offshore substation installation
Turbine installation
Management of all marine operations and logistics.

Interface management is a key area where Subsea 7 can add value to the delivery of an offshore windfarm project. By taking responsibility for integrated installation, Subsea 7 manages a lot of the risks associated with the various interfaces.

Subsea 7 brings core skills from its oil and gas business into offshore wind:
Project management and engineering
Risk management
Safety culture and approach
Marine operations in a harsh environment
Design and build of new marine equipment
Ability to work in a collaborative contracting arrangements.

Currently, the Offshore Wind Alliance members are co-located in the SSE Centre of Engineering Excellence for Renewable Energy in Glasgow. They are engaged in pre-feed work, undertaking conceptual engineering studies on the Beatrice Offshore Windfarm Development.

The site is located in the Outer Moray Firth on the north-western point of the Smith Bank,
approximately 13.5km from the Caithness coastline. It will cover an approximate area of 131.5km The site is adjacent to the worlds first deep water windfarm development the two-turbine (10MW) Beatrice Demonstrator Project. The Beatrice Demonstrator turbines are owned by SSE and Talisman. and have been operational since 2007.

Building on the success of the Beatrice Demonstrator Project, SSE are proposing to develop an offshore windfarm which will generate up to 1,000MW of renewable energy, enough to power over 796,000 homes. The proposed windfarm will have between 142 to 277 turbines, depending on turbine size.

Beatrice Offshore Windfarm Limited is the joint venture partnership formed between SSE
Renewables (75%) and Repsol Nuevas Energias UK (formerly SeaEnergy Renewables) (25%).


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