采用偏心割刀处理小口径钻孔掉钻事故实践

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

摘要:

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。

Abstract:

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.