可移动式自升式钻井平台的插桩压载风险浅析

与相对固定的导管架或平台相比,可移动式自升式钻井平台从诞生之日起就要经历不断的拖航-就位-插桩-作业-拔桩-再拖航这样周而复始的过程,桩腿和桩靴从始至终都会面对着各种不同类型的海床及浅表地层的考验。尤其是随着钻井平台箱体自身重量的增大,作业水深的增加,作业周期的延长和极端恶劣作业环境的影响,对于桩腿和桩靴及相关支撑结构的要求越来越高,同时对于操作船体升降的工程技术人员也提出了新的课题。笔者通过分析总结了通常插桩压载的经验,并提出了施工工程的注意事项。

Analasis of risk when preloading on mobile jack-up drilling platform

Comparing with stationary conductor structure or platform,mobile jack-up drilling rig will face the operation precedure(towing-position-operation-pull up leg-retowing)from it is built up.So the rig's leg and spud-can will face the difficulties of different sea bed and shallow formation,especially with heavyer rig weight,deeper water working depth,more operations and exteme bad working environment.All of these need more stonger related structure of leg and spud-can.At the same time those give the on-site eng...