| 1. | Stability analysis of drill - string in directional drilling
定向井钻柱稳定性分析 |
| 2. | Analysis of longitudinal and torsion vibration of drillstring
钻柱纵向和扭转振动分析 |
| 3. | A similar - helix model of drillpipes buckling
钻柱失稳的准螺旋模型研究 |
| 4. | Specification for engineers ' ratchet braces and drilling pillars
工程用棘轮摇钻及钻柱规范 |
| 5. | Recommended practice for drill stem design and operating limits
钻柱设计和操作限度的推荐作法 |
| 6. | Dynamic simulation of the contact between drill stem and well wall
钻柱与井壁接触的动态仿真分析 |
| 7. | Dynamics analysis of drillstring failure
钻柱失效的动力学分析 |
| 8. | Torsional vibration simulation analysis of drilling string and rock bit
钻井用钻头和钻柱扭转振动的仿真分析 |
| 9. | Study on the lateral vibration rule of drilling string under reversion
对钻柱在反转情况下横向振动规律的研究 |
| 10. | Vibration absorber for drilling string
钻柱减震器 |
