At Heerema Vlissingen, one of the fabrication facilities of Heerema Fabrication Group, the 8,500 t DONG Hejre launch jacket for client Technip, sailed to its offshore location in the Danish sector of the North Sea.
The contract comprises the procurement and construction of a jacket, pre-drilling wellhead deck and piles. The Vlissingen yard started fabrication of the launch jacket in January 2013. The 8-leg launch jacket measures 60 x 35 x 85 m, including two buoyancy tanks of 400 t each installed on both sides to keep the jacket floating after launch. The pre-drilling wellhead deck has a weight of 900 t and measures 40 x 12 x 10 m.
The jacket was successfully skidded onto the Heerema barge H-627 on 22 April, followed by the 900t wellhead deck on 6 May, whereafter the seafastening operation started. Yesterday, the barge loaded with the jacket and wellhead deck has set sail to its final offshore destination for installation by sister division Heerema Marine Contractors. Hereafter drilling will commence followed by the topsides installation in 2015.
Koos-Jan van Brouwershaven, CEO of Heerema Fabrication Group, comments: “The launch jacket of Heerema Vlissingen has been successfully delivered as a result of the good cooperation and mutual focus on achieving mechanical completion of the jacket between DONG, Technip, Heerema Marine Contractors and Heerema Fabrication Group.”
The Hejre oil & gas development is located on the Danish North Sea in 70 meter water depth. It is expected that the platform will be operational in 2015. The Hejre development is an interest of 60% DONG and 40% Bayerngas.