自升式钻井平台桩腿齿条磨损及裂纹的修补工艺探讨

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作者单位:: 中国船级社青岛分社海工处, 山东青岛 266400
Qingdao Branch of China Classification Society,Qingdao 266400,China

关键词:: 海上钻井平台;桩腿齿条;无损检测;缺陷;磨损;裂纹;焊接修复
offshore driling platform;leg racks;NDT;defect;abrasion;crack;welding repair

摘要:: 胜利5号自升式钻井平台在特检和坞检时，经无损检测发现桩腿齿条和升降齿轮磨损极其严重，有208个齿磨损深度超过7mm，占总齿数的25%，还有部分裂纹，已达报废程度，后经验船师与焊接工程师反复探讨、试验，制订了一套较为科学的焊接修复工艺，在施焊过程中，专人施焊，专人监督、检测，最终修复成功，恢复了桩腿的使用功能。本工艺对今后钻井平台桩腿的维修，对高强度钢焊接具有一定的参考价值。
Critical abrasions were found between the leg racks and gears by NDT during the special inspection and dry-docking inspection.There were 208 teeth on the racks having the abrasion depth exceeding 7mm,and the number is almost 25% of the total teeth on the racks.Cracks were even found in some locations.The racks almost failed for the abrasions,but they have been repaired to reach the original designated capacity with a scientific welding repair procedure worked out by surveyors and welding engineers，and with critical supervision and inspection.This procedure will be valuable for repairs of mobile drilling units and welding of high strength steel.

2010,4(4): 12-14 收稿日期：2009-12-30

分类号：TE951

作者简介：赵广景（1971-），男，山东鄄城人，工程师，1995年毕业于哈尔滨工业大学，现从事海洋工程现场检验工作。