bit feed,drill feed

Research of diamond weak combined bit for high geo-stress stratum drilling;

弱包镶金刚石钻头在高地应力地层中的应用研究

Research into the new electroplating weak-holding diamond bits;

新型电镀弱包镶金刚石钻头研制

Research,development and application of the series core drilling bit for uranium exploration;

铀矿勘查岩心钻探系列钻头的研制、开发与应用

Research of the Edge Grinding with the Simplified Conical Drill;

简化钻头圆锥面刃磨法的研究

Dynamic Model of Drill during Vibrational Drilling;

振动钻削时钻头的动力学模型

A Forecasting System for Wear of Drill;

基于电流信号钻头磨损状态预报系统

Geared hydraulic motor design for drill bit of rotary well wall coring utensil;

旋转式井壁取芯器钻头的齿轮液压马达设计

Investigation in the direction controlling system of drill bit on horizontal auger;

套管螺旋钻机钻头控向系统的研究

The quantitative calculation of the forces between drill bit and formation is vital for drilling trajectory control.

定量计算钻头与地层之间的作用力对井眼轨迹控制具有重要意义。