发明名称 |
DELVIS NEDSENKBART BOREFARTOEY, SAMT FREMGANGSMAATE TIL FORBEDRING AV OVERLEVELSESEVNEN OG ENDRING AV STABILITETSEGENSKAPENE TIL DET DELVIS NEDSENKBARE BOREFARTOEY |
摘要 |
There is described a vessel such as a semi-submersible drilling unit having a drilling deck structure with a plurality of columns depending from the deck. Pontoons are provided at the ends of the columns and a buoyant configuration modifying sleeve-like element is mounted around the columns. The sleeves are annular in cross-section and of generally cylindrical form and terminate at their lower ends in cuffs of reducing outer diameter. This provides an inwardly tapered or curved end to the sleeve. A cable and pulley arrangement is provided for vertically moving the sleeves along the columns and for locating them on the columns close to the unit transit waterplane and at a survival waterplane position. <IMAGE> |
申请公布号 |
NO173691(B) |
申请公布日期 |
1993.10.11 |
申请号 |
NO19850004200 |
申请日期 |
1985.10.21 |
申请人 |
CANADIAN PATENTS DEV;CANADA NAT RES COUNCIL |
发明人 |
PAWLOWSKI JACEK S |
分类号 |
B63B35/44;B63B39/02;B63B43/14 |
主分类号 |
B63B35/44 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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