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φ89mm反循环取心钻头是冲击回转取心钻进中最具有代表性的钻头,也是最具研究价值的钻头结构。通过对其形成岩心过程进行有限元分析,并进行取心试验,得到了φ89mm反循环取心钻头获得岩心短且带裙边的原因。
φ89mm Reverse Circulation Coring Bit is the most representative bit in impact rotary coring and the most valuable drill bit structure. Through the finite element analysis of the core forming process and the coring test, the reason why the core is short and the skirt is obtained by φ89mm reverse circulation coring bit is obtained.