HDDs Burbo Bank Windfarm Extension
Dong Energy is currently engaged in construction work to expand the Burbo Bank wind farm in Liverpool Bay. The VolkerInfra/VBMS joint venture was commissioned to carry out the work for landfall of the export cable from the wind farm extension. Visser & Smit Hanab was subcontracted to perform the two required horizontal directional drillings, using the 250-tonne drilling rig.
The first drilling to be carried out was a HDD landfall, which involved drilling from the land to the beach. The drilling crossed under a railway track, a caravan park, a golf course and a sea defence wall and had a length of 638.5 metres. Because the exit point was on the beach, allowances had to be made for the large difference in tides. For the undersea cable, a PE100 SDR 13.6 cable pipe with a diameter of 800 mm was installed. This drilling was performed between mid-May and mid-June 2015.
