自升式平台迁移过桥后桩腿拼装方案研究
2012-09-06瞿成飞吴凡
瞿成飞 吴凡
摘要:自升式平台是一种海上活动式钻井装备,目前是全球海洋石油勘探中使用最多的一种钻井平台,它由船体、桩腿、升降机构及一系列钻井设备所组成。自升式平台迁移过程中,桩腿升至主甲板百米以上,在远程拖航时会通过一些跨海大桥,由于大桥距离海面净空限制,因此在拖航之前需要把桩腿进行分段截断,通过大桥后再把截下来的桩腿拼装上去,但是往往由于过桥后进入内海,当地浮吊起吊高度不够,不能把超过吊高限制的桩腿部分吊装至安装高度。如何把上面几部分桩腿分段拼装上去以保证平台桩腿的正常使用,本文研究的方案巧妙地利用自升式平台自动升降的功能解决了这类工程难题,对于自升式平台迁移过桥的类似工程问题具有重要的借鉴意义。
关键词:自升式平台 桩腿迁移 过桥拼装
Abstract:Jackup is a removable drilling equip which usually be used in ocean oil exploration and drilling. It consists of main hull、leg、jackcase and other drilling equipments. The leg will be jack up to more than hundred meters from main hull when rig being transport crossing some bridges, and it need to divide the leg to several sections due to the bridge headroom restriction,.after crossing the bridge we need to assemble them together. The problem is that after crossing the bridge there can not find a floating crane to lift the divided sections to the required height to assemble them together. So this paper want to consider an ingenious method to solve the problem like that,its can be taken as example when encounter the same engineering problems.
Keywords: Jackup, Leg, Transport, Cross the bridge, Assemble.
中图分类号:TU232文献标识码: A 文章编号:
1. 背景介绍
博斯普鲁斯海峡(StraitofBosporus)又称伊斯坦布尔海峡。它北连黑海,南通马尔马拉海和地中海,把土耳其分隔成亚洲和欧洲两部分。海峡全长30.4公里,最宽处为3.6公里,最窄处708米,最深处为120米,最浅处只有27.5米。博斯普鲁斯在希腊语中是“牛渡”之意。传说古希腊万神之王宙斯,曾变成一头雄壮的神牛,驮着一位美丽的人间公主,从这条波涛汹涌的海峡游到对岸。海峡因此而得名。大桥建于1973年,全长1560米,跨越海峡水面1074米,桥身离海面64米,各种类型的船只都可以通过,是欧洲第1大吊桥,世界第4大吊桥。……
