...隧道;自然通风;模型实验;竖井;可行性 [gap=735]Keywords city tunnel; bnatural ventilation; model experiment; vertical well; feasibility ...
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vertical well cage 垂直井笼 ; 铅直井笼
vertical well of water distribution 冷却塔配水竖件
vertical well of water distrlbution 冷却塔配水竖井
near-vertical well 接近垂直的井
Taking into account the rotating effect of the drillstring, this paper presents a bifurcating differential equation for the rotating slender drillstring being in tension in vertical well section.
考虑到垂直井中钻柱受拉段在旋转时的转动效应,建立了顶部悬挂、受分布浮重作用的旋转细长钻柱的分岔微分方程。
参考来源 - 垂直井中旋转钻柱受拉段分岔研究 STUDY ON BIFURCATION FOR TENSILE·2,447,543篇论文数据,部分数据来源于NoteExpress
Drilling a horizontal well is more difficult than a vertical well.
水平井比垂直井更难钻。
Study shows that horizontal well is better than vertical well for improving production result.
研究表明:水平井比直井更利于改善和提高油田开采效果。
The technology is the same with vertical well, also with high Angle deviated hole, and has broad application range.
该项工艺不仅适用于直井,也适用于大斜度井,因而,适用范围大,应用前景广。
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