... 四牙轮钻头 crosssection cone bit; four cutter bit; four roller bit; four-roller bit 牙轮钻头 cone rock bit; rifler; rock drill bit; rock roller bit; roller cone bit; roller cutter bit; roller rock bit; roller-cone bit; roller-type bit; rollerbit; rolling cutter bit; rolling cutter rock bit; tooth-wheel bit; toothed roller bit; true-rolling bit 烧结硬质合金钻头 sintered-metal bit ...
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The paper introduced the successful application of high bench caving method of using deep hole roller rock bit into the practice of solving the complex goaf area, a stuff problem of this kind.
采用深孔牙轮钻机、利用高台阶崩落法成功地处理了复合采空区，解决了复合采空区处理难的问题，使技术人员在熟练浅采、深采空区处理的情况下，又探索出复合采空区的处理方法。
Analysis of the side-wall pattern shows that the side-cutting process of the roller bit 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。
The rock-breaking mechanism of roller bit 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。
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