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''Q4000'' is a unique multi-purpose oil field construction and intervention vessel commissioned in 1999 by Cal Dive International, and was built at the Keppel AmFELS shipyard in Brownsville, Texas. She was delivered in 2002 within the $180 million budget, and operates under the flag of the United States. She is operated by Helix Energy Solutions Group. The original Q4000 concept was conceived and is owned by SPD/McClure. The design was later modified by Bennett & Associates LLC who was selected to develop both the Basic and Detailed design.〔(Bennett & Associates L.L.C Website )〕 ''Q4000'' also has a unique column-stabilized semi-submersible design that combines dynamically positioned station-keeping with a large deck space, significant deck load capacity and a high transit speed of 12 knots. The vessel provides a stable platform for a wide variety of tasks, including subsea completion, decommissioning and coiled tubing deployment, and she is specifically designed for oil well intervention and construction in depths of up to 3048 meters of water. ==Specifications== The design of the ''Q4000'' includes the following features:〔 〕 *Dynamic positioning with 6 azimuthing thrusters *A multi-purpose Huisman designed three-sided tower capable of fulfilling all traditional derrick roles *Two Huisman cranes with lifting capacities of 160 and 360 Tonnes *Seabed access to 3048 meters *An 11.9 meter x 6.4 meter moonpool *A 7 3/8 inch intervention riser system (The vessel was refitted with a slimbore drilling capability in 2008). *A 3048 meter heavy weather ROV system *An overall deck capacity of 4,000 Tonnes 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Q4000」の詳細全文を読む スポンサード リンク
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