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Products and solutions, 2005-12-05, 02:37 PM

Pipeline construction completed just in time

The artificial drilling and production island "Mittelplatte" in the Wattenmeer off Friedrichskoog is getting a new ultramodern drilling rig, the T 150, a colossus comprising a 2,200 tonne steel structure and machinery scheduled to come on stream around mid-December, 2005, for drilling for oil at a depth of 10,000 meters in the North Sea. ThyssenKrupp Xervon has been responsible for fabricating and laying the some 3,000 meters of continuous pipeline.

The client for the equipment costing about 38 million Euros is the Mittelplate Consortium consisting of RWE - DEA AG and Wintershall AG. Bentec GmbH Drilling & Oilfield Systems in Bad Bentheim was in charge of building and installing the T 150 (following the successful test run).
Back in November of last year, employees of ThyssenKrupp Xervon got started on the prefabrication of the total of 3,000 meters of pipeline. The latter consists mainly of stainless steel, particularly in those areas where aggressive media like oil well fluid or seawater will flow through the pipelines. For air and water supplies, however, pipes made of coated and galvanized "standard" steel are sufficient. The pipe diameters range from 20 to 300 millimeters and are designed for pressures between 10 and 350 bar.

Delivery as and when

During the construction period, the pipes had to be produced in time for call-off as the project proceeded. "We had to work at precisely the same pace as Bentec," explains Knut Walte, Site Manager of ThyssenKrupp Xervon. "We preassembled the pipes at our Lingen location and supplied them to the contractor at the Bentec plant some 40 kilometers away on exactly the specified date." At peak times, up to 30 specialists - mainly welders and pipe fitters - from the services provider were in simultaneous action.
On successful completion of the tests at the Bentex plant, the rig was disassembled and taken to Cuxhaven where it was pre-assembled into three units. From there the rig parts were transported by flat-bottomed boat to the drilling rig for final assembly and installation. And during all this assembly work, ThyssenKrupp Xervon was literally part of the crew.

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