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Guide tower mounted crane for a jack-up platform
Guide tower mounted crane for a jack-up platform
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机译:导向塔式起重机,用于自升式平台
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摘要
A new and improved crane adapted to be rotatably mounted about the guide tower of a vertically movable leg of an offshore jack-up platform. In one form, the crane is mounted for rotation about the leg tower section on a bearing tube having a thrust bearing interposed between a tower section flange and the lower end of the bearing tube. In a second form, the crane is mounted about the leg tower section utilizing upper rollers and hook rollers coacting with a support flange mounted with the tower section.
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