精密深孔钻孔工具
precision deep hole drilling tool
钻孔扩孔
bore hole drilling and enlarging
提升臂钻孔工具组件
lift arm boring tool group
旋转导向钻井工具
Rotary Steering Drilling tool
rotary steerable drilling tool
定向钻扩孔
reaming operation in directional drilling
扩孔工艺
enlarging porousness technology