通过156口调整井钻井试验，对比分析了刮刀钻头和牙轮钻头的钻进特性、牙齿磨损特性、井底流场特性及钻井效果。
Through drilling experiment in 156 adjustment Wells, the drilling behaviors, cutter wear, downhole jet flow field and drilling effect of drag bits and roller ones were comparatively analyzed.
钻头的工作情况可以根据综合录井资料分析判断，反映钻头磨损程度的主要特征参数有扭矩和钻时。
We can analyse and diagnose bit working state based on integrated logging data. The main characteristic parameters for bit wearing degree are torque and drilling time.
本文通过焊接试验、显微分析和磨损试验论述了以铬、镍、铁基合金代替钴、铬、钨合金作石油钻头牙爪堆焊耐磨合金的问题。
In this article we discussed the possibility of replacement of cobalt alloy by Cr-Ni iron Base alloy in drill bit bearing on the basis of welding test, wearing test and microscopic examination.
分析了牙轮钻头安装和磨损间隙引起牙轮相对牙爪轴线的平移和倾斜对相邻锥体上球齿间隙的影响，通过计算，当牙轮、牙爪轴线轴向、径向平移使球齿的趋近量有抵消的趋势；
The paper analyses the effect of translation and offset angle of the cone axis to shaft one on the gap variation between two ring-button, which position on two cones.
本文最后，对轮式金刚石钻头轴承的磨损进行了分析，并计算了滑动轴承预期寿命。
Finally, on the wheel bearing wear diamond bit was analyzed and calculated bearing life expectancy.
分析了牙轮钻头滑动轴承失效的机理，论证了牙轮钻头滑动轴承失效形式主要为粘着磨损，分析了影响轴承粘着磨损失效的主要因素。
The failure mechanism of journal bearing of roller cone bit is analyzed, the failure type is adhesive wear, and main factors affecting the adhesive wear are analyzed.
分析了牙轮钻头滑动轴承失效的机理，论证了牙轮钻头滑动轴承失效形式主要为粘着磨损，分析了影响轴承粘着磨损失效的主要因素。
The failure mechanism of journal bearing of roller cone bit is analyzed, the failure type is adhesive wear, and main factors affecting the adhesive wear are analyzed.
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