rock-bit interaction岩石与钻头互相作用
rock-bit牙轮钻头
rock roller bit牙轮钻头
rock drill bit岩石钻头
electric rock drill bit电动钻岩机钻头
rock core bit取心钻头
rock drilling bit钎头
electric railway rock drill bit电动钻岩机钻头
rock-bit interaction model岩石
Tri-cone rock bit is the important tool in oil drilling,so its capability and quantity affect the speed and cost of oil drilling greatly.
三牙轮钻头是石油钻井的重要工具，其性能和质量对钻井速度和成本影响很大。
参考来源 - 基于PRO/E的三牙轮钻头CAD系统的研究与开发How to improve the working performance of rock bit journal bearings (RBJB) and prolong its life span under high working speed is one of the urgent problems faced by oil drilling engineering.
如何提高现有牙轮钻头轴承的工作性能，延长其在高转速下的使用寿命，是目前钻井工程领域迫切需要解决的问题之一。
参考来源 - 牙轮钻头浮动套轴承工作机理研究