By means of the economic analysis of the whole drilling rig, the author proclaims that the hydraulic coupling drive is excel to the hydraulic torque converter drive, and it is the direction of development of mechanical drilling rigs.

• 做了全钻机经济性分析。 最终得出液力偶合器传动优于液力变矩器传动的结论,认为液力偶合器传动将成为机械驱动钻机的发展方向。