Optimal pressure of TCT roller cutter based on characteristic particle method
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摘要: 为解决反井钻机钻压与地层快速匹配问题,首先基于岩石破碎能量理论和岩碴Rosin-Rammler分布机理,通过理论分析证明盖克相似说下特征粒径与钻压呈高斯函数关系,邦德裂纹说和黎金格新表面说下特征粒径均与钻压呈二次函数的倒数关系,由此得到通过岩碴分析镶齿滚刀最优钻压的特征粒径理论。而后通过六排镐形镶齿滚刀的直线破岩试验,验证了特征粒径理论,证明盖克相似说和邦德裂纹说下特征粒径理论在分析六排镐形镶齿滚刀时具有较好的适用性,通过以上两种方法得到的特征粒径最大时的钻压,即为最小比能法得到的最优钻压。为了提高邦德裂纹说下特征粒径理论的拟合精度,也能使用高斯函数进行拟合。最后,将特征粒径理论应用于白鹤滩溜渣井工程,验证其在反井施工现场的适用性。
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关键词:
- 镶齿滚刀 /
- Rosin-Rammler /
- 最优钻压 /
- 特征粒径 /
- 比能
Abstract: In order to solve the matching problem between drilling parameters and formation quickly and conveniently for raising-boring machine, firstly, based on the theory of rock crushing energy and the Rosin-Rammler distribution mechanism of ballast, the theoretical analysis shows that the characteristic particle size has Gaussian distribution relationship with the pressure under the Kick's similarity theory, and it has reciprocal quadratic function relationship with the pressure under the Bond's crack theory and the Riginger's new surface theory. Thus, the theory of the characteristic particle size under the optimal drilling pressure of insert cutters is obtained through the rock ballast analysis. Then, through the linear cutting tests on the insert cutter with six rows of picks, the theory of the characteristic particle size is verified, and it is proved that it has a good applicability for analyzing the above cutter using the Kick's similarity theory and the Bond's crack theory. The pressures obtained by the above two methods when the characteristic particle size is the largest are the optimal ones obtained by using the minimum specific energy method. In order to improve the fitting accuracy using the Bond's crack theory, the Gaussian function can also be used to fit the theory of the characteristic particle size. Finally, the theory of the characteristic particle size is put into practice in Baihetan raising-boring project, and its applicability in the construction site is verified.-
Keywords:
- TCT roller cutter /
- Rosin-Rammler /
- optimal pressure /
- characteristic particle /
- specific energy
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表 1 拟合参数
Table 1 Fitting parameters
大理岩 花岗岩 钻压/kN a b 钻压/kN a b 75 0.43 2.70 25 0.39 1.05 100 0.46 2.28 50 0.43 2.54 125 0.47 3.90 75 0.52 4.89 150 0.67 9.82 100 0.51 4.17 175 1.07 11.37 125 0.55 5.29 200 0.91 12.06 150 0.48 4.83 -
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