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冲旋钻井技术可有效提高硬地层、易斜地层的机械钻速。以岩石力学为基础,建立了冲旋钻井破岩力学模型。以空气锤钎头的实际工作情况为基础,使用LS-DYNA模拟仿真了钎头的破岩机理,包括不同倾角球齿冲旋破岩的破碎体积、破碎深度及最大等效应力。结果表明:在选择边齿倾角时,应优先选择20°、25°、30°、35°;设计单斜面钎头时,优先选择30°和35°边齿倾角;在设计双斜面钎头时,应优先选择20°和35°组合。分析结果为空气锤钎头的设计提供了参考。
Rough drilling technology can effectively improve the hard formation, inclined to the ground penetration rate. Based on the rock mechanics, a rock-breaking mechanics model of rotary drilling is established. Based on the actual work of air hammer bit, LS-DYNA was used to simulate the rock breaking mechanism of the bit, including the crushing volume, crushing depth and maximum equivalent stress of punching and breaking rock with different inclination balls. The results show that 20 °, 25 °, 30 ° and 35 ° should be selected preferentially when the inclinations of the bevel gear are selected. When the single bevel sharpening bit is designed, the bevel angles of 30 ° and 35 ° are preferred. , Should be preferred 20 ° and 35 ° combination. The analysis results provide a reference for the design of air hammer bit.