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Transport & installation of two 2GW converter stations for the BalWin1 and BalWin2 offshore grid connection systems in the German North Sea.
Company: Dragados Offshore (end client Amprion Offshore)
Location: north of Norderney, German North Sea
Water depth: 39 - 42 metres
Transport & single-lift installation of two 2-GW offshore converter stations
Installation campaign 2020-30
Combined output will supply over 4 million households with clean electricity
Topsides weighing up to 33,000 tonnes, jackets up to 14,500 tonnes
Scope of work
- Transport of 2x transformer topsides & jackets from fabrication yard to Kristiansand for transfer to Pioneering Spirit
- Transport to the field and single-lift installation of max. 33,000-tonne converter topsides (with TLS) & max. 14,500-tonne jackets (with JLS)
- Lift, stab & drive 24 foundation piles (incl. noise mitigation) with 5000-tonne crane
- Grout the annulus between the piles & pile sleeves
- Welding the topsides legs to the jackets
- Perform jacket cut-off
- ROV debris survey
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Specials & challenges
- Jackets & topsides transported by barge and installed in a single campaign
- Transport & single-lift installation of jacket foundation & converter topsides (incl. piling of foundation piles)
- Strict environmental regulations & new legislative area of operations
- Transport & single-lift installation of two 2-GW offshore converter stations
- Combined output will supply over 4 million households with clean electricity
- Topsides weighing up to 27,000 tonnes, jackets up to 13,000 tonnes
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