陀螺定向钻进中孔口锁的改进及应用  

Improvement and Application of Mouth Lock in Top Directional Drilling

作　　者：巩建雨[1] 

机构地区：[1]中国煤炭地质总局水文局第四水文地质队,河北邯郸056001

出　　处：《中国煤田地质》2007年第A02期97-98,共2页Coal Geology of China

摘　　要：在煤田陷落柱内施工注浆孔时,常需要施工分支孔,陀螺定向钻进是施工分支孔的手段之一,陀螺定向能否锁定已定好方位的入孔钻具是定向成败的关键一环。针对以前孔口锁锁定入孔钻具的弊端,提出了一种新孔口锁结构。该孔口锁由四部分组成:上半部、下半部、固定螺丝、支撑腿。改进后的孔口锁既能方便锁定入孔钻具,又能提高定向中靶率。During the drilling of grouting holes in subsided columns in coalfield, branched holes are often needed. Top directional drilling is one of branched hole drilling means and can or cannot lock the oriented drilling tools in hole is key link leading to success or failure. After analyzed previous mouth locks can lock oriented drilling tools in holes put forward a new handy, safe, economic and practical method to lock drilling tools in hole, meanwhile improving directional drilling success rate. The method has certain guiding significance to lock drilling tools in top directional drilling hence forth.

关 键 词：陀螺定向 孔口锁 简便 安全 经济实用 定向中靶率 

分 类 号：P634.4[天文地球—地质矿产勘探]