建立了直井中钻柱屈曲的平衡方程及对应的泛函表达式，并首次采用有限元法对斜直井中钻柱屈曲的整个过程进行了分析。
The entire buckling process of tubing in deviated wells is analyzed for the first time by utilizing the finite element method.
针对复杂地电模型的井地电法三维反演方法研究一直是一个具有挑战性的课题。
Considering complex geoelectric model, the study of 3-d inversion approaches of borehole-to-surface electric data is always a challenge.
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