在进行浮动的海上作业时，节流和压井管线从水下防喷器组出来，之后沿钻井隔水导管外侧面到达水面。

In floating offshore operations, the choke and kill lines exit the subsea BOP stack and then run along the outside of the drilling riser to the surface.

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涠洲1 2-1B 油田在钻井过程中井下情况比较复杂，钻井作业施工时间长，这对钻井隔水导管的稳定性提出了更高的要求。

During the process of Weizhou12-1B Oilfield we ll drilling, downhole instance is complexity, and drilling time is longer, so drilling riser pipe has to have a good depth stability.

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结合海上钻井施工特点，进一步计算出隔水导管的合理入泥深度。

Taking the engineering characteristics of offshore drilling into consideration, the optimal driving depth of riser has been gained. The calculating results met the real conditions perfectly.

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