In this paper, the problem about stability of the drill stem in the borehole with iso-curvature is studied by use of energy method.
文中利用能量法，研究了等曲率井眼中钻柱的稳定性问题。
In this paper, the problem about stability of the drill stem in the borehole with iso-curvature is studied by use of energy method.
文中利用能量法，研究了等曲率井眼中钻柱的稳定性问题。
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