penetration advance

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-drilling technology,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 speed are 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 speed of 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 speed have been discovered,and the bucket teeth angle formula under optimal drilling speed has 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。

Application of downhole hydrodynamic propulsors solves the problem of exerting WOB, and are helpful to enhancing penetration rate.

井下液力推进器的应用在一定程度上解决了钻压的施加问题，有利于提高钻进速度。

Application in Angles Measurement for Directional Drilling with Micromachined Polysilicon Accelerometers

微硅加速度计在定向钻进角度测量中的应用

Research on Static and Dynamic Properties of Feeding System of High-speed and High-precision PCB CNC Drilling Machine

高速高精度PCB数控钻床进给系统静动特性的研究

Research on Control of High-speed and High-precision Servo Feeding System of PCB CNC Drilling Machine

高速高精度PCB数控钻床伺服进给系统的控制研究

The speed of soil delivering and resistance of auger drill are analyzed theoretically and their formulae are presented.

对螺旋钻具输土速度与阻力进行理论分析,给出了输土速度公式和阻力公式。

Razor Tergum digs into the ground and digs out at another place quickly.

剃背迅速地钻进地底并在任一个地方钻出来。

Research on Bit for Efficient Drilling of Gas Drainage Borehole in Nantong Mining Area;

南桐矿区瓦斯抽放孔快速钻进钻头的研究

He darted off the road into the bushes.

他迅速离开大街钻进了灌木丛。

He slipped off his invisible cloak and jumped into bed.

他迅速脱下隐身斗篷，然后钻进床里。

a high speed drill that dentists use to cut into teeth.

牙医用来打进牙齿的高速钻机。

Study on High Speed Drilling in Deep 38CrMoAl Steel Tube;

38CrMoAl料筒高速深孔钻进研究

Design Improvement on Variable Transfer Case of GZ-ⅢA Drilling Rig

SGZ-ⅢA型钻机变速分动箱改进设计

Research on the Technology of Increasing Drilling Penetration in Xujiaweizi Region

徐家围子地区提高钻井速度技术研究

Study on High Accuracy and High Speed PCB NC Drilling Machine Based on PLC

PLC型高速高精度PCB数控钻床的研制

To increase the speed of.

加速，促进加快…的速度

THE ROP ANALYSIS OF 12(1/4) IN. HOLE SECTION DRILLING WITH MUD IN LONGGANG DISTRICT

龙岗地区12(1/4)英寸泥浆钻进井段机械钻速分析

Means are provided for varying the spindle speed and (on some machines) for automatically feeding the drill into the workpiece.

另有各种装备可改变转轴速度及使钻头自动钻入工作件中。

Classification of Build-up Intensity in Trenchless Technology for Pipe Laying

导向钻进非开挖铺管的导向强度研究