In geologic exploring bores construction of deep-exploiting the blind-main-well project in Tonglushan mine,bores are fulfilled once with the measures of installation technology,downward tube sheathed and diameter changing technology, full-drillingtechnology,and parameters′ control of drilling process technology,etc.

在铜绿山矿深部开采盲主井工程地质勘探钻孔施工中,通过采取安装技术、下套管及换径技术、满眼钻进技术、钻进工艺技术参数控制、测斜技术等一系列受控定向钻进技术措施,配合使用KXZ-1A型数字测斜仪进行高精度钻孔测斜,使钻孔一次成孔,全孔偏斜率仅1。

Based on the project example,the problems affecting portable drill′s drilling speedare statistically analyzed,then examine the effect after improvement.

该文以工程实例为基础,对影响轻便钻机钻进速度问题进行了统计分析、改进和效果检查,并就改进后的轻便钻机在工程中的应用提出了一些想法和体会。

The main factors affected on the drilling speedof drilling method are rock-cutting and mud discharge.

影响钻井法钻进速度的因素主要有破岩和排渣。

By researching on the characteristics of quaternary Q_1 strata,some relationships between bucket teeth angle and drilling speedhave been discovered,and the bucket teeth angle formula under optimal drilling speedhas been fitted out by least square method.

旋挖灌注桩成孔施工在郑西客运专线三门峡段第四纪Q1地层中遇到难钻进、难卸土问题,通过研究地层工程地质特性,对旋挖钻机不同斗齿刃前角对应的钻进速度进行统计分析,用最小二乘法拟合最佳钻进速度和斗齿刃前角的关系。