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Post Info TOPIC: MPU heavy lifter


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MPU heavy lifter
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mpu.jpg . MPU_july07_007.jpg

 

MPU begins construction of innovative single-lift semi submersible

MPU has started construction of its innovative 15,000t single lift semi submersible, for use in transporting oil and gas platforms from sea to shore, the MPU Heavy Lifter.

The vessel takes a unique approach to lifting these giant loads. Rather than using pairs of cranes to lift topsides from a jacket or quay onto a transport vessel, the entire U-shaped craft is ballasted down, and moved below the load. Close to the load, it manouvers precisely using its own thrusters; over larger distances it is pulled by tugs.

A pair of hydraulically operated lifting frames on either arm of the craft are then moved out, and the vessel raised to lift the load away from the jacket. The lifting frames are equipped with interface absorption devices; these, in conjunction with the specially-designed flushing tanks, mean that the lifter does not need to use complex heave compensation systems.

The heavy lifter can use the lifting frames to raise and lower topsides weighing up to 15,000t. It can also use strand jacks, fitted on the arms of the vessel, to lower jackets weighing up to 25,000t.

MPU recently began, pouring the first of the lightweight concrete that will form the basis of the heavy lifter. The concrete used weighs only 2/3 of normal concrete. This stage of fabrication is taking place at the Keppel Verolme yard in Rotterdam.

Conceptual development of the vessel was undertaken in 1996–98, by engineers Dr.techn.Olav Olsen a.s. The concept was presented to Philips Petroleum Company of Norway and Conoco, from the Netherlands, in 1997. MPU was founded in 1997, with support from the Norwegian government, Conoco and Elf. Since then, the company has been testing the concept, refining the design and, in 2000, the design was studied by DNV.

source: http://www.cranestodaymagazine.com/story.asp?storycode=2046799



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The get a clear picture of the size of this structure watch the small box below the helicopter platform - it is "building size" and contains the crew quaters...

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heavy lifter went out of business ...



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Reading List:

Basic Concrete Engineering for Builders with CDROM / Design of Concrete Structures / Strength Design for Reinforced - Concrete Hydraulic Structures Engineering Manual on CD / Design of Offshore Concrete Structures / Construction of Marine and Offshore Structures, Second Edition (Civil Engineering - Advisors) / The Dock Manual: Designing/Building/Maintaining / Theory and Design of Concrete Shells / Thin Shell Concrete Structures / design procedures of reinforced concrete shell structures (JGJT 22-98) / Understanding Structures / Concrete Planet: The Strange and Fascinating Story of the World's Most Common Man-made Material / Concrete Construction Manual (Construction Manuals (englisch)) / Large Wind Turbines: Design and Economics / Dynamics of Offshore Structures / Offshore Technology in Civil Engineering / Design of Offshore Concrete Structures / Concrete in the Marine Environment (Modern Concrete Technology)

-- Edited by admin on Thursday 15th of March 2012 11:27:55 PM

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