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。
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。
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。
Through the correspondence between the preferred targets for drill bits and the factors that affect the bit,a mathematical model is established.
针对目前钻头选型的常用方法,主要讨论邻井钻头优选算法,该算法根据邻井钻头使用数据,对钻头的优选指标与钻头在钻井过程中的影响因素之间的对应关系建立数学模型,利用最小二乘法预测出各种钻头的优选指标,选择其中满足优选条件的钻头型号的方法。
The Design of Aiguille Repair Tool Based on RE;
基于RE的钻头修复工具设计
The structure and the working process of the abrasive water jet drilling-cutting aiguille were illuminated.
详细说明了磨料射流钻割一体压控钻头结构组成及其工作过程,介绍了高压磨料射流切割煤岩原理,通过试验,总结分析了磨料硬度、磨料粒径以及磨料流量对钻头切割性能的影响。
Due to a great deal of parameters of semi-automatic tracing-target aiguille which was the key part of some bomb- disposing equipment, and the factor of cost and time, a real-time simulation system of the aiguille was designed.
针对某新型排弹设备研制中半自动寻的钻头参数众多,开发调试费时费力等因素,对其进行了实时仿真系统设计。
unit-type drill head
组合钻床钻头, 标准钻头
drill(ing) head
钻头; 主轴头; 钻床床头箱; 钻削动力头;钻头头部, 钎头
part of a drill that grips the bit
夹头（钻或钻床上用以夹住钻头的部分）.
a small bit that drills a first hole to guide a larger drill.
钻凿初洞来导引大钻头的一种小钻头。
easing the bit in
钻头轻压慢转钻进地层
A tool used for drilling.
钻头用于钻孔的工具
a bit used in drilling for oil.
油田钻井使用的钻头。
A pointed and threaded tool for drilling and boring that is secured in a brace, bitstock, or drill press.
钻头曲柄、钻柄或钻床之上用于钻孔的尖头工具
eggbeater PDC bit
打蛋器型PDC钻头
Drilling is cutting a hole with a drill.
钻削就是用钻头钻一个孔。
Comparative analysis of drilling characteristics of dia- mond bits and roller bits
金刚石钻头与牙轮钻头钻井特点对比分析
bit cutting angle
钻冠的尖度，钻头磨角，钎子头刃角
A needle-shaped drill for boring holes in rock or masonry.
钻头，钻石器，钻孔器用于在岩石或砖石上钻孔的针形钻
An awl with a beveled tip, used to make holes in wood for brads or screws.
锥钻，打眼钉钻头倾斜的钻子，用于在木头上钻孔以钉角钉或螺钉
a thin bit a center point and cutting edges on either side.
一头是圆头、一头是切边的一种瘦钻头。
a drilling bit with cutting edges usually hard-tipped against wear.
有靠着钻身的硬顶和切边的一种钻井钻头。
7.12 Trip up at once, pull the bit into the casing.
立即起钻，将钻头提到套管内。
Sometimes he sends his drill more than a mile into the earth.
有时他得把钻头钻入地下一英里深。