Geological hazards,such as the shallow gas,shallow flow and natural gas hydrate,are the major technical challenges being confronted in the progress of deepwater drilling.Surface jetting drilling is a kind of deepwater drilling technology which is to adapt to the loosened characteristics of the deep seabed soil and avoids shallow geological disasters.A finite element model is built to mimic the interaction between jetting conductor and soil.With the model,the stress field and displacement field of soil corresponding to different displacement is calculated and analyzed.The results show that:With the increasing of displacement,the disturbance range of soil affected by jetting increases and the stress of soil increases.On the vertical direction,with the increase of displacement soil stress increases and the maximum is at the casing shoe.The farther from the casing shoe,the smaller the soil stress is.On the horizontal direction,with the increase of displacement soil stress increases and the maximum is at the casing shoe.The results of this research can provide certain reference for the high-daily-cost marine drilling speeding up.
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