roller cone bit

常见例句

On the system dynamics, the dynamics model for roller cone bit under the interaction of drilling string and rock was established.
从系统动力学的角度出发，建立了基于钻柱、岩石相互作用下的牙轮钻头动力学模型。
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The high grade artificial diamond with the lowest magnetism is picked up to strengthen the surface of steel tooth roller cone bit;
磁选热稳定性良好的优质人造金刚石作钢齿牙轮钻头齿面强化材料；
Simulated test was made to indicate the charges in volume and in Pressure of ths lubrication system in a roller cone bit at high temperature and under high pressure downhole.
对牙轮钻头润滑密封储油系统在井底高温条件下的容积及压力变化进行了模拟实验。