| 摘要: |
| 为了分析钢粒冲击岩石的破岩效果,应用动力瞬态非线性有限元方法，建立球形钢粒冲击岩石的计算模型,并对 其破岩过程和破岩机制进行分析。钢粒冲击岩石的理论最优粒径为0. 1 -0. 3 cm、冲击速度为100 ~250 m/S、入射角为 0°-20%室内钢粒冲击岩石试验结果表明:加人钢粒后岩石的冲击破碎体积是不加钢粒的4倍多;在常规钻井机械水 力联合破岩的基础上,加人钢粒会大幅度提高硬地毡的钻井速度;试验验证r数值模拟的正确性。 |
| 关键词: 有限元方法 钢粒冲击岩石 硬地层 破岩 |
| DOI： |
| 分类号: |
| 基金项目: |
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| Numerical analysis on rock breaking effect of steel particles impact rock |
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XU Yi-ji, ZHAO Hong-xiang, SUN Wei-liang, REN Jian-hua, QIAN Hong-bin
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(College of Petroleum Engineering in China University of Petroleum, Dongying 257061, China)
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| Abstract: |
| In order to analyze the rock breaking effect of steel particles on rock, a computational model of rock breaking by round steel shot was established with dynamic transient non-linear finite element method. The rock breaking process and mechanism were analyzed. The optimal parameters of particle diameter，penetrating velocity and input angle are 0. 1 -0, 3 cm, 100 -250 m/s, 0° -20° respectively. Experimental results show that the rock breaking effect with steel particles is four times of that without steel particles. Based on mechanically combined with hydraulic power in conventional drilling, adding the action of steel particles impact rock, the drilling speed will be increased. The validity of simulation is verified by experi- |
| Key words: finite element method steel particles impact rock hard formation rock breaking |
