• An enlarged pipe at the top of a casing string that serves as a funnel to guide drilling tools into the top of a well.

    管柱顶部根大口径形如漏斗引导钻井工具进入到井眼的顶部。

    youdao

  • An enlarged pipe at the top of a casing string that serves as a funnel to guide drilling tools into the top of a well.

    管柱顶部根大口径形如漏斗引导钻井工具进入到井眼的顶部。

    youdao

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