摘要
绳索取心钻进施工中常出现卡钻、埋钻和钻具断裂事故。一些孔内事故处理需要很长时间,尤其是深孔事故发生后投入了大量的财力、人力进行处理,最终还不一定能取得成功。在此情况下,采用侧钻绕障而避开孔内事故钻具则是一种理想的选择,可大大缩短事故处理时间,避免钻孔报废带来的损失。重庆北碚龙车勘探区ZK6-2孔运用螺杆定向钻进侧钻分支绕障方法取得成功,并积累了宝贵的经验。
Drill rod sticking,burying and breaking are common accidents in wire-line coring drilling.Obstacle-avoiding by sidetracking is an ideal choice,accident treating time can be greatly shortened to save the borehole from being abandoned and reduce the loss brought by accident.The paper introduced a case in Chongqing,PDM directional sidetracking was used for obstacle-avoiding branch with success.
出处
《探矿工程（岩土钻掘工程）》
2011年第11期32-34,共3页
Exploration Engineering:Rock & Soil Drilling and Tunneling
关键词
螺杆钻
侧钻
分支绕障
孔内事故
绳索取心钻进
PDM
sidetracking
obstacle-avoiding branch
accident in borehole
wire-line coring drilling
