采用偏心割刀处理小口径钻孔掉钻事故实践

偏心割刀切割钻杆、钻具,多应用在大口径工程施工钻中,在地质钻探施工中,偏心割刀可以用来切割套管、岩心管。在贵州省普安县青山镇泥堡二矿的钻探施工中,使用偏心割刀从钻杆的外面将钻杆切割掉,成功处理了一次复杂的钻孔事故。介绍了采用偏心割刀处理钻孔事故的技术措施及注意事项。

Accident Treatment for Assembly Dropdown in Small Diameter Borehole with Eccentric Cutting Knife

Cutting drilling pipe and the assembly with eccentric cutting knife is usually applied in the large diameter engineering borehole construction;and in geological drilling,eccentric cutting knife can used to cut the casing pipe or coring barrel.The paper described a successful treatment practice of complex borehole accident in a drilling construction in Guizhou,the drilling pipe was cut down from the outside with eccentric cutting knife,and introduced the technical measures and the attentions.