Analysis of the side-wall pattern shows that the side-cutting process of the rollerbit is related to not only the teeth surface design but also the rock property and the drilling parameters.
井壁模式分析说明，牙轮钻头的侧向切削过程不仅与齿面结构有关，而且与岩石性质、钻井参数有关。
2
The rock-breaking mechanism of rollerbit teeth is always a hot focus and difficulty in the fields of drilling, and it receives widely researchers attentions in the rock mechanics and the engineering.
牙轮钻头牙齿破岩机理研究一直是钻井工程的一个热点和难点，备受岩石力学与工程界的关注和重视。
3
The paper introduced the successful application of high bench caving method of using deep hole rollerrockbit into the practice of solving the complex goaf area, a stuff problem of this kind.