Modules for an offshore drilling rig

By order of the Deggendorf-based company Streicher, the Contract Manufacturing Department produced a number of steel structures for an offshore drilling rig VDD 400 in 2013. The special thing about the drilling rig is the modular design that facilitates transportation and speeds up assembly and dismantling. None of the modules from which the complete drilling rig is assembled weighs more than twelve tonnes. An additional benefit of the modular design is the easy replacement of components that are in need of repair.

Since April 2013, the Rädlinger Contract Manufacturing Department has received a series of orders for a wide variety of steel components. For the offshore requirements, special paintwork is necessary that protects the steel from the effects of the weather. The design and construction took place according to Norwegian safety standards (Norsok), which are considered to be the strictest throughout the world. Thus, huge wind speeds of up to 225 km/h had to be taken into consideration, amongst other things. In addition, comprehensive testing of the welding seams (PT, UT, MT and RT test) and full documentation of all the materials used are necessary. The Contract Manufacturing Department conducted a special lifting test to test the attachment points for an approx. 4.5 t oil collection tank. A test weight of 27 t was used for this, calculated from 2.5 times the empty weight after completion, including the built-in components of the module. The structure successfully passed the stress test, suspended from a crane.

Streicher received the order for the drilling rig from the Norwegian company Archer, which uses the offshore drilling ring for the removal and closure of existing drill holes in the North Sea.


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