将被损坏的套管割断，并从井中取出。

The damaged casing is cut and removed from the well.

youdao

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。

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.

youdao

套管补贴工具被下入井中，这时工具端部的橡胶或铅对留在井中的被割断套管的顶部进行密封。

The casing-patch tool is lowered into the well where rubber or lead on the end of the tool is used to seal against the top of the cut casing remaining in the well.

youdao