大家在查： ObjectCol sheepandgoat 威廉·希克默基 lubinshenmogroup 哈伯历 College Institute Yanofsky 1957年12月特那森

钻井钻

钻井钻

钻井钻

钻井钻

1

All of those were expected to provide reference for further studying of erosion abrasion in gas drilling .

这将为更深入地研究气体钻井钻柱冲蚀磨损工作提供了依据和参考。

3

Method for evaluating fatigue damage of drill string in side tracked holes

侧钻井钻柱疲劳损伤评价方法的研究

4

Reaming Technique of Side - Tracked Well

侧钻井钻后扩眼技术

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