- North Sea, UK
- Mono pile
- PBA 936
Sheringham Shoal Offshore Windfarm is completed in 2011. It consist of 89 Siemens 3,6 MW windturbines. The first 23 foundations are installed by MTHojgaard using the special heavy lifting vessel Svanen.
The other 66 foundations are installed by Seaway Heavy Lifting using their new built vessel Oleg Strashnov.
In case of early refusal drilling techniques of DDC are used to allow the pile to be driven to the final depth. The job is executed with the Wirth PBA 936 using a drillbit of 4400 mm diameter.
This PBA 936 with a torque of 360 kNm is hydraulically driven by a Power pack and works with the reverse air lift drilling principal.