S75-SF中深孔绳索取心钻具结构及应用
Exploration Engineering(Rock & Soil Drilling and Tunneling)(2012)
Abstract
随着中深孔地质岩心钻探工作量的大幅增长,不仅对绳索取心钻柱提出了严格要求,对绳索取心钻具的功能和可靠性要求也越来越高。S75-SF绳索取心钻具采用了双弹卡结构,增强了悬挂机构的安全性,提高了内管总成的投放和打捞速度,减轻了孔内冲洗液压力波动,在正常钻进时可降低泥浆泵压力损失,有利于复杂地层孔壁稳定。内管总成机构与内岩心管采用插接的连接方式,拆卸方便,便于钻探施工人员采取岩心。该钻具在施工中效果良好,减轻了工人的劳动强度,提高了施工效率,可满足中深孔绳索取心钻探施工要求。
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Key words
medium depth hole,core drilling,inserted connected structure,double elastic clip structure,wire-line coring drilling tool
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