New Offshore Contracts for Jan De Nul Group
Jan De Nul has recently been awarded a number of projects related to Oil and Gas Clients for a total value of approx 100 mil USD.
At Ras Laffan (Qatar), landfall trenching in hard rock is executed on projects for Qatargas
and Rasgas awarded by Mc Dermott.
The near shore section will be trenched with a new developed elevated excavator with rock breaker.
The offshore section will be dredged with the backhoe dredger Jerommeke.
The pipelines will bring gas onshore from offshore fields for liquefying and further transport to Europe, Japan and US with gas tankers.
At Melut Basin (Sudan), trench dredging through hard coral soil is executed for seabed preparation for pipeline installation.
In view of the trenching depth in 50 meter of water depth, these works are executed with the very large trailing suction hopper dredger 'Vasco da Gama' (hopper capacity 33.000 m3) equipped with a newly designed ripper drag head.
Dredged materials were disposed sidewards of the trench by rainbowing.
Two projects have been awarded by Aker Kvaerner/ ExxonMobil for the Adriatic LNG project.
At Algeciras, near Gibraltar, a berm and tow out channel have to be dredged to allow a large GBS (Gravity Base Structure) which is built in a dry dock to be towed out to sea.
The berm will be dredged by the backhoe dredger 'Il Principe' and / or cutter suction dredger 'JFJ De Nul'.
The GBS has to be installed on the seabed approx 30 km from Venice in Italy, and serves for storage of liquefied gas imported from Qatar.
After regasification, the gas is pumped by pipeline into the Italian network.
After positioning of the structure offshore Venice, Jan De Nul has to ballast the GBS with approx 270.000 tons of high density metal slag for which a pumping installation will be tested and installed on the barge DN 120. Subsequently, rock will be installed along the platform with the new side dumping vessel JDN 8623 to protect the structure against scour.
The new rock side dumping vessel will have a capacity of nearly 3 times the largest existing side dumping vessel.
This large capacity will allow to install rock for covering offshore oil and gas pipelines, scour protection around offshore platforms and construction of marine breakwaters at lower cost.
Its high sailing speed makes it possible to load directly at the quarry, as such eliminating the need for offshore transshipment from supply barges.
The vessel is dynamic positioned DP class 2, enabling safe operation alongside offshore platforms and structures. It can also be equipped with a telescopic fallpipe installation.
Source: Jan De Nul Group, November 2006