A mill is usually used to remove junk in the hole or to grind away all or part of a casing string.
铣鞋通常用于除去井下的碎屑或者研磨掉整个或部分套管。
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。
The rotor is provided with a plurality of impact knives complementary with a plurality of impact knives disposed on the inside top surface of the mill casing.
所述转子配备有多个冲击刀，所述多个冲击刀与设置在所述磨机外壳的内部顶面的多个冲击刀互补。
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