roller bit 牙轮钻头 ; 旋转钻头 ; 滚轮式钻头 ; 轮钻牙头
rock roller bit 牙轮钻头
three roller bit 三牙轮钻头
roller-bit hole rig 牙轮钻机
Reed roller bit 瑞德牙轮钻头
six-roller bit 六牙轮钻头
three-roller bit 三牙轮钻头
a roller bit 牙轮钻头
In this paper, on the basis of the results obtained from the bench and field tests of the three roller bit, its improving direction is approached.
本文以三牙轮钻头的台架试验和油气田现场试验的效果为依据，探讨三牙轮钻头的改进方向。
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 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。
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