动力传到螺杆轴上，由螺杆带动星轮旋转。
Power reached the screw axis, Driven by the star wheel rotating screw.
空气螺杆钻具是专为空气钻井而设计的动力装置。
The air screw drill tool was power equipment which was designed for air drilling.
由于螺杆钻具本身具有良好的动力特性，在套管内侧钻中得到广泛应用。
Positive displacement motor is widely used in sidetrack drilling inside casing because of its excellent dynamic characteristic.
应用推荐