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。
In this paper,by testing and analyzing,it is showed that the performance of drill bits are influenced by various factors in the hot pressure sintering process of intermediate-frequency furnace.
通过试验和分析 ,说明在中频热压烧结金刚石钻头过程中 ,钻头性能受各种因素综合影响 ,其主要因素是电磁场影响到胎体粉料和金刚石分布 ,模具配合间隙引起胎体的流失而导致金刚石浓度发生变化。
CAD/CAM technique in PDC drilling bits female mould processing base on Pro/E;
基于Pro/E的PDC钻头模具加工CAD/CAM技术
, drilling parameters reasonably matched well, polymer clay free drilling fluid injected-time prolonged, drilling bit types .
通过合理匹配钻井参数、延长聚合物无固相钻井液的使用时间、优选钻头类型、提高钻井液抑制性、改善钻具结构等技术措施,极大地提高了该地区的钻井速度,平均机械钻速提高到现在的12m/h以上,缩短了钻井周期,达到了预期的效果。
Geometrical optics approach can only calculate the high frequency approach solution of drilling bit vibration source wave equation in non caustic area but it become invalid in caustic area.
由于几何光学法求解钻头震源波动方程的高频近似解有局限性,即在焦散区失效,故只能计算非焦散区的高频近似解。