多波束贴近探测在海管悬空病害治理中的应用

Application of multi-beam close-proximity detection in the treatment of freespan pipeline defects

在复杂的海洋生态环境下,随着海底管道服役年限的增加,海底管道的裸露、悬空病害现象显著,严重威胁着海洋石油生产安全。为了准确评价海管悬空病害发育程度,指导治理工程施工作业。采用水下机器人(ROV)搭载多波束测深仪,开展近距离探测的方法。确定了海底管道准确的悬空段位置、悬空高度及悬空长度,引导了悬空抛石治理作业,评价了治理效果。结果表明:ROV搭载多波束测深仪能近距离贴近管道,完成精细化探测,避免海面波浪、潮涌对多波束探测的影响,较为准确地评价病害程度并指导治理施工。

In the complex marine ecological environment,with the increase of the service life of submarine pipelines,the phenomenon of exposed and suspended diseases of submarine pipelines is obvious,which seriously threatens the safety of offshore oil production.In order to accurately evaluate the development degree of the suspension of the sea pipe and guide the construction of the treatment project.The remotely operated vehicle(ROV)was equipped with a multi-beam echo sounder to carry out short-distance detection.The exact position,height and length of the suspended section of the submarine pipeline were determined,the treatment of suspended rocks was guided,and the treatment effect was evaluated.The results showed that the ROV equipped with a multi-beam depth sounder could get close to the pipeline at a close distance,complete refined detection,avoid the influence of sea waves and tidal surges on multi-beam detection,and more accurately evaluate the degree of disease and guide the construction of treatment.