| 1. | Contact stress analysis on the bearing of single - cone bits
单牙轮钻头轴承接触应力分析 |
| 2. | The computer simulation model study of singular one - cone bit
异形牙轮单牙轮钻头的计算机仿真模型研究 |
| 3. | Study on pz modular roller - cone bit and rock drilling technology
系列组合牙轮钻头及其嵌岩技术的研究 |
| 4. | Analysis of the factors of the cutting efficiency about single - cone bit
影响单牙轮钻头切削效率的原因分析 |
| 5. | High speed journal seal of cone bit design and finite element method analyze
高速牙轮钻头轴承密封副设计与有限元分析 |
| 6. | Blast hole tricone rock bits
矿用三牙轮钻头 |
| 7. | Steel tooth bit
钢齿牙轮钻头 |
| 8. | 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。 |
| 9. | But now the use of the spherical one - cone bit shows that the teeth are abrade heavily in advance , which affects the velocity and life of the bit
但是目前油田上使用的球形单牙轮钻头由于牙齿先期磨损严重，影响了钻头的机械钻速和寿命。 |
| 10. | The structure of tri - cone rock bit is complicated . as the cutting structure touch the stratum directly , it affects the process of breaking rock and the performance of tri - cone rock bit
三牙轮钻头结构复杂，其中齿面结构直接与地层接触，对于岩石破碎过程和钻头工作性能的影响最大。 |
