在钻井施工中，白垩系、侏罗系地层井壁失稳严重。
In the drilling process, the collapse of wellbore wall is severe in the Cretaceous and Jurassic strata.
钻柱振动现象在钻井施工中是非常突出和明显的现象。
It is a very obvious phenomenon of the drill string vibrating in the drilling.
在钻井施工中精确控制了水平段轨迹，应用了悬空侧钻技术。
During drilling operation, the track in horizontal interval is controlled and the hang sidetrack drilling technology is successfully used.
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