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12. 发明授权

US4273067A Method of operating twin hull semisubmersible derrick barge 失效
标题翻译：双船半潜式井架驳船的操作方法
公开(公告)号：US4273067A
公开(公告)日：1981-06-16
申请号：US22506
申请日：1979-03-21
申请人： Samuel H. Lloyd, III , Yoram Goren
发明人： Samuel H. Lloyd, III , Yoram Goren
IPC分类号： B63B35/44 , B63B39/03 , B66C23/52
CPC分类号： B63B35/44 , B63B1/107 , B63B39/03 , B66C23/52
摘要： The derrick barge comprises a pair of laterally spaced elongated hulls having a plurality of upstanding columns spaced therealong supporting a working platform and a heavy duty derrick or crane in spaced relation above the hulls. The hulls bouyantly support the vessel including its deck load in the floating condition with the hulls having freeboard. The hulls have ballast compartments to submerge the hulls and portions of the stabilizing columns to a distance of approximately one-half the effective height of the stabilizing columns to maintain the vessel in a semisubmerged floating condition with the platform and derrick elevated above the waterline. However, the vessel also may be ballasted or deballasted to submerge or emerge to a greater or lesser extent from the semisubmerged condition such that the distance between the mean water surface and either the underside of the deck or top side of the hull is not less than 0.75 of the mean wave height. The columns stabilize the vessel in the semisubmerged condition about roll and pitch axes. The heavy duty derrick is located adjacent the stern portion of the vessel with its vertical axis of rotation intersecting the vessel centerline. This novel twin hull column stabilized derrick barge arrangement has excellent motion minimizing characteristics under wave action in operations at sea.
摘要翻译：井架驳船包括一对侧向间隔开的细长船体，其具有多个直立的塔，其间隔开支撑工作平台和在船体上方间隔关系的重型起重机或起重机。船体在船体具有干舷的情况下，浮动地支撑船舶，包括其甲板载荷。船体具有压载舱，以将船体和部分稳定塔淹没在距离稳定塔的有效高度的大约一半的距离处，以将船舶维持在半沉积的浮动状态，使平台和井架升高到水线以上。然而，船舶也可能被压载或卸载，以从半浸入状态或多或少的程度淹没或出现，使得平均水面与甲板的底面或船体顶侧之间的距离不小于 0.75的平均波高。这些柱子在关于辊和俯仰轴的半冲击状态下稳定船舶。重型井架位于容器的船尾部分附近，其垂直轴线与船舶中心线相交。这种新颖的双壳体柱稳定的井架驳船装置在海上作战中具有优异的运动最小化波浪作用下的特性。

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