一个为期十年的监测恶劣环境下海底油井钻井作业的项目已经取得了令人感兴趣的结果。

海底生产井和勘探井承受来自钻井隔水管和海底防喷器 (BOP) 的负载。随着时间的推移，后者的尺寸和重量不断增加，导致井口负载更大。

海底导体的主要任务是将这些负载转移到海底。施加在井口上的弯曲载荷被传递到导体中，导体再次将载荷通过水泥传递到土壤中。

如果施加在土壤和水泥上的负载超过其承受能力，导体周围的土壤可能会破裂。填充导体和土壤之间空腔的水泥也会破裂，从而失去其预期功能。这种支撑退化降低了导管支撑油井的能力。

4Subsea 针对海底油井作业的海底井口完整性监测 (SWIM) 服务现已投入运行十多年。

A decade-long project to monitor drilling operations on subsea wells in harsh environments has delivered interesting results.

Subsea production and exploration wells are subjected to loads from the drilling riser and subsea blowout preventors (BOP). The latter have grown in size and weight over time, resulting in larger wellhead loads.

The main task of a subsea conductor is to transfer these loads into the seabed. The bending load applied on the wellhead is transferred into the conductor, which again transfers the loads through the cement and into the soil.

In cases where the load exerted on the soil and cement exceeds the capacity, the soil around the conductor might fail. The cement filling the cavity between the conductor and the soil can also crack and consequently lose its intended function. This support degradation reduces the conductor’s ability to support the well.

4Subsea’s Subsea Wellhead Integrity Monitoring (SWIM) service for operations on subsea wells has now been in action for more than a decade.