圆筒型海洋钻井平台立柱大肘板横向裂纹原因分析及返修工艺

Reason Analysis and Repair Procedure of the Transverse Crack in Big Bracket of Cylindrical Offshore Drilling Platform's Column

希望号系列圆筒型海洋钻井平台在施工过程中,EL4.5m平台立柱大肘板出现了大量的延迟横向裂纹,结合平台结构的特点分析裂纹产生的原因,制定详细的裂纹返修工艺,包含裂纹清除、焊材选择,返修过程控制、返修后的检测等,大肘板按照该返修工艺一次性返修合格。

In the process of construction of the Hope series cylindrical drilling platform,a lot of delay transverse cracks appeared in the big brackets of the EL4.5 platform’s column.Based on the characteristic of the structure,the causes of cracks were analyzed,so as to set forth the rational repair process,including crack eliminating,choice of welding material,process control measures,detection and so on.According to the repair process,the big bracket is qualified for one-time repair.