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News

Shallow water pipelay vessel ensures positional accuracy

Guntermann & Drunck : 24 November, 2013  (Application Story)
With a length of 120m, the Stingray is a huge factory at sea. Dutch Van Oord's first shallow water pipe lay vessel. Her infrastructure holds KVM hardware from German Guntermann & Drunck, the computer applications required for the process of laying pipes.
Shallow water pipelay vessel ensures positional accuracy
The prime focus of Stingray is laying pipelines combined with shore approaches and other associated activities in shallow water from five metres up to more than 100 meters. Also the vessel is suitable for light offshore installations. Van Oord is a Dutch-based leading international contractor specialising in dredging, marine engineering and offshore projects in oil, gas and wind. The recovery of oil and gas resources is a complex task. But the real difficulty is a safe and environmentally friendly way to transport the valuable substances.
 
The barge itself and her standard equipment was built in China, but was later tailored and converted by Van Oord who adjusted it to the needs of a shallow water pipe lay vessel. The Stingray is designed in accordance with the quality and safety standards in the oil and gas industry and equipped with state-of-the-art machinery to install pipelines from 6 to 60 inches in diameter.
 
Pipe after pipe goes into the belly of the ship where they are prepared. Workers weld the tubes in place together in only a few minutes. The pipe curves downward from the stern over the stinger through the water until it reaches the "touchdown point," or its final destination on the seafloor.
 
On board, multiple computers control and monitor the processes of the precision work. They are installed in a safe technical equipment room. Via Guntermann & Drunck's KVM matrix DVICenter, the computers are bound together and operation is extended up to the nautical bridge. The dual graphic card consoles of the KVM matrix on board are operated by the surveyor and the chief officer.
 
Among lots of other tasks, the surveyor provides general information about the pipe laying process while the chief officer is mostly concerned about the anchor pattern and anchor handling to hold the vessel in place. Laying pipelines requires precision as well as high standard technical equipment. Over distances of 100km, a deviation of only a few centimetres can cause a gap of almost 100m. Therefore, the demands on positioning accuracy are high, and the pipelines must be prevented from cracking during installation and neither undulations nor currents must disturb laying the pipes.
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