RENEWABLE ENERGY
Offshore Renewable Energy
Operators and contractors which were traditionally active in offshore and subsea Oil & Gas sectors have progressively developed interest in the Renewable Energy market. They are joining onshore Electrical and Utilities operators in their quest to develop wind and current-power offshore stations and farms.
Specialised companies within the Reef Subsea Group have developed solutions, gained experience and contracted agreements to answer requests from both operators and contractors in this area.
Subsea Construction and IRM
Technocean’s experience in subsea construction, inspection repair and maintenance (IRM) and marine operations, together with the Group’s excellence in Project Management and commitment to the highest of QHS&E standards are particularly relevant to the needs of this growing market.
Technocean has been operating in the offshore renewable sector for the past few years, focusing in particular on services associated with the installation and commissioning of inter array cables:
- Pre-lay and post-lay cable route surveys
- Cable installation and remedial work
- Cable trenching and burial and stabilisation, including mattress placement
- J-tube installation and cable pull-ins
- General construction and ROV support.
Technocean’s current projects include the combined delivery of vessel and ROV services in connection with the development of both the Greater Gabbard and the Thanet Offshore wind parks located off the coast of England The contract has given Technocean a major part to play in the construction of what is currently in 2011 the world’s largest offshore wind farm.
Partnerships
Technocean has entered into a number of partnerships to enhance its capability in the Offshore Renewables market sector. Our partnership with Goodtech (formerly Troll Power) provides competence and expertise related to the technology required for large offshore electrical subsea systems associated with offshore wind farms.
Installation & Trenching
Building on the successful experience of Technocean with Thanet and Greater Gabbard, and aspiring to answer the larger scope requirements of clients including oil and gas operators, offshore wind farm developers, project management and engineering houses and product manufacturers, Reef Subsea has extended its activities by providing installation and trenching services to the Offshore Oil & Gas and Renewables markets via Reef Subsea Power and Umbilicals.
Located in Stockton on Tees, North-East England, Reef Subsea Power & Umbilicals is dedicated to becoming an installation and trenching partner of choice, via the provision of:
- Onshore and Offshore project and engineering Management
- Installation of submarine cables and umbilicals
- Trenching
- Remedial and Deburial Services
- Subsea Construction
- Via Group companies:
- ROV and Survey Services
- Seabed Dredging
Seabed dredging and rock removal
Scanmudring’s extensive know-how and range of high precision dredging equipment has already been successfully transferred to the offshore renewable energy market. Scanmudring’s experience of this market includes:
- maintenance and repair of the world’s longest subsea power cable – NorNed for Satnett-, followed by limited trenching tasks (up to 1800m)
- local dredging and de-burial work to allow maintenance and repair of the world’s first life of field seismic (LoFS) system - Valhall for BP Norway - followed by limited trenching tasks for burial of umbilical’s and seismic cables.
Scanmudring was chosen for these projects because of the high accuracy and low downtime for the Scanmachine (around 1.5%). In both cases, the use of the Monitoring Excavation System (MoS) helped prevent any damage to live cables or umbilicals. These works were performed in shallow waters with very limited visibility.
MoS provide the Scanmachine and Scancrawler operator with a virtual working environment by creating a 3D model of the machine and its position on a terrain model representation of the work location.It gives an accuracy in machine working envelope of +/-5 cm.