Vinca Gorthon phase I: Directional drilling unit version 2
The Vinca Gorthon is a Swedish Roll-on roll-off freighter (166m x 23m, 18,500 tons) built in 1987. On 29 Februari 1988 the ship sank due to shifting freight, mainly rolls of paper, at 16.5 nm west of Petten, the Netherlands.
The vessel landed exactly on a subsea oil pipe, on the traffic separation scheme off Texel. The damaged pipe line has been blinded and rerouted around the Vinca Gorthon.
Due to an increased number of ship movements on the Northsea, developments in the offshore and the installation of near-shore wind farms, ship traffic has been brought closer. The location of the vessel is such that part of the available preferred shipping routes are blocked and this is the main reason Rijkswaterstaat on behalf of the Netherlands wants the Vinca Gorthon removed.
Titan Salvage won the tender for the removal. The method for removal is cutting the vessel in several pieces and lifting the pieces one by one on a submerged barge. Refloat the barge and tow the barge to shore where the piece will be lifted on land and scrapped.
To be able to lift the pieces DISA has been asked to drill 30 holes under the various pieces and put lifting chains in the holes drilled.
DISA upgraded the existing version of the horizontal directional drilling unit in cooperation with van Leeuwen. The initial version was used on the MSC Napoli and a number of modifications have been implemented to increase the reliability of the system.
Client: Titan Salvage
Location: 16.5 nm west off Petten, Northsea, the Netherlands