- Whessoe and VolkerStevin JV
- Milfordhaven, UK
- Dolphin piles
- PBA 815
In 2004 the decision was made to modify the existing jetty in such way that the jetty will be suitable to receive large LNG carriers.
Four berthing dolphins and six mooring dolphins 2,5m diameter are constructed. A temporary casing pile 3m diameter is placed to drill a hole of 2,8m into the rock.
To minimize dispersion in the environment the drilling residue is pumped into a barge to settle.
The job was executed with the Wirth PBA 815 with drill bit 2750 mm diameter and using the reversed airlift drilling method.