The breaking and milling tool is a special tool used which is used to cut and mill a section of casing in hole so that sidetrack drilling operation can be done smoothly.

断铣工具是用来割断并磨铣井内一段套管以能够进行侧钻作业的专用工具。

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The damaged casing is cut and removed from the well.

将被损坏的套管割断，并从井中取出。

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For improving need assembling the casing head, the cutting casing pipe on project, we have designed the device of cutting casing head to change unfavorable factors using acetylene gas to cut case.

为满足在钻井施工中安装套管头、切割套管的需要，改变乙炔气割影响施工质量和时效的不利因素，设计了一种套管切割机。

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In working to expand mining of the cavern, the company made a cut in the well casing several hundred feet above its top, said Chustz.

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The other process, still in use, is to cut a window in an old well's steel casing and then drill horizontally into the oil zone.

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