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12. 发明授权

US4232625A Column stabilized semisubmerged drilling vessel 失效
标题翻译：柱稳定的半沉积钻井船
公开(公告)号：US4232625A
公开(公告)日：1980-11-11
申请号：US18253
申请日：1979-03-07
申请人： Yoram Goren , Charles Springett
发明人： Yoram Goren , Charles Springett
IPC分类号： B63B35/44 , B63B39/03 , E21B7/128
CPC分类号： B63B39/03 , B63B1/107 , B63B35/4413 , E21B7/128
摘要： The vessel comprises a pair of laterally spaced elongated hulls having a pair of upstanding columns at opposite ends thereof supporting a working platform and a drilling mast in spaced relation above the hulls. The hulls buoyantly support the vessel in a low draft in-transit floating condition with the hulls having freeboard. The hulls have ballast compartments to submerge the hulls and portions of stabilizing columns such that the waterline lies intermediate the height of the columns with the platform and drilling mast elevated above the waterline. The columns stabilize the vessel in the high draft condition and the number, cross-sectional area and configuration of the columns, the weight distribution of the vessel and the geometry of the submerged hulls and portions of the columns are such that the vessel obtains motion minimizing characteristics in the high draft condition. Various features include hydrostatic and geometric properties wherein the ratio of the righting moment about the pitch axis to the righting moment about the roll axis in high draft condition is within a range of 1.0 to 1.3 while the ratio of vessel length to width lies within a range of 1.2 to 1.5; a natural period in heave in a range of 16-18 seconds; and a heave response amplitude operator in a range of about 0.35 to 0.60 in the range of waves of 10-14 seconds.
摘要翻译：船舶包括一对侧向间隔的细长船体，其在其相对端处具有一对直立柱，其支撑在船体上方的间隔关系的工作平台和钻桅杆。船体在船体处于干舷的情况下，在低通风条件下浮起来支持船只。船体具有压载舱，以淹没船体和稳定塔的部分，使得水线位于塔的高度之间，平台和钻桅杆升高到水线之上。柱在高吃水条件下稳定容器，柱的数量，横截面面积和构型，容器的重量分布以及浸没的船体和柱的部分的几何形状使得容器获得运动最小化特征在高吃水条件下。各种特征包括流体静力学和几何性质，其中在高牵伸条件下围绕俯仰轴线的平衡力矩与绕轧制轴线的弯矩的比率在1.0至1.3的范围内，而容器长度与宽度的比率在范围内为1.2〜1.5; 16-18秒范围内的自然时期; 以及在10-14秒的波的范围内在大约0.35至0.60的范围内的起伏响应振幅算子。

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