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滚球式平底磨鞋是用底面所堆焊的YD合金去全面磨碎那些卡死在井内无法打捞的钢铁落物，并且在磨鞋圆柱面上有可以起扶正作用的滚球，使磨鞋在井眼内工作时不磨铣套管内壁。
The rolling--ball flat--bottom mill shoe whose bottom face is overlaid with YD alloy is used to fully grind junks which is stuck downhole and impossible to be caught. Additionally, rolling balls which are dressed on cylinder face of mill shoe can guarantee the mill shoe not to mill casing inside wall during milling operation in hole.
技术规格及参数
| 型号 |
外形尺寸 |
接头螺纹 |
下入套管 |
| GQM140 |
ф118×460 |
NC31 |
5 1/2" |
| GQM168 |
ф146×480 |
NC38 |
6 5/8" |
| GQM178 |
ф155×500 |
NC38 |
7" | |
|
