... 骨干 1.[解剖学] (长骨的中央部分) diaphysis2.(起主要作用的) backbone; mainstay 科技队伍的骨干力量 the backbone of the scientific and technological contingents; 起骨干作用 be a mainstay; 领导骨干 mainstay of the leadership; 骨干分子 core member; key member; 骨干工程 backbone projects; major projects; 骨干企业 key enterprises; 骨干炎 diaphysitis 中段泵壳；中段 stage casing 空中段 air distance ...
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The reason for this is that the occurrence of this stage could happen before or after the end of phase I depending on the distance the influx has to travel before it enters the casing shoe.
其理由是依据侵入进入套管鞋前必须运行的行程，该阶段可能发生在I阶段之前或之后。
The stage where the volume pumped places the influx inside the casing shoe (the shoe line), is important as well but has not been included in these basic phases in well control.
泵入体积将侵入挤入管鞋内这一阶段是个十分重要的阶段，但不包括在井控的这几个基本阶段。
Application results indicate that the tool is safe, reliable and easy to operate and can effectively prolong well's life and reduce casing repair, casing patching or well workover in later stage.
现场应用效果表明，工具安全可靠、操作方便，能有效延长油井寿命，减少后期的修套、补套或修井工作。
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