Full-scale fatigue test of drill pipe and borehole tests of drill pipes containing defects prove the reliability of assessment methods and software posed in this paper.
通过钻杆全尺寸疲劳试验和含有缺陷钻杆的井下试验，证明了本文提出的评价方法和软件是可靠的。
This paper discusses the prediction of the drill stem torque and bit forward direction in an offshore horizontal well by nonlinear FEM.
探讨了非线性有限元在预测水平井钻进中的钻柱扭矩及钻头前进方向的应用。
The paper describes briefly the structural features and performance of the drill and its effects in use as well.
本文简要介绍了该设备的结构特点、性能及使用效果。
This paper introduces the working principle and structure parameter of the picker finger seed drill.
本文阐述了指夹式排种器的工作原理和结构参数。
In the paper, a new working layer structure of diamond core drill for solving the problem is introduced which can increase the efficiency and the working life of the drilling tool.
文章介绍了金刚石钻孔工具一种新的工作层结构，该结构可以有效解决钻孔工具排粉散热难问题，提高钻孔工具的工作效率，延长钻孔工具的使用寿命。
On the basis of theoretical linear model, the paper studies the influence of input flow on operating parameters of shock mechanism for hydraulic rock drill, and a series of brief formulae are derived.
在理想线性模型的基础上，研究了输入流量对液压凿岩机冲击机构工作参数的影响，得到了一组简明公式。
Sand paper or a wire brush on an electric drill.
砂纸或钢丝刷对一个电钻。
In this paper, through the analysis of complex formation and leakage features of adjustment well in Zhongyuan Oilfield, the result shows that antileakage is key to drill successfully adjustment well.
中原油田地层情况复杂，漏失量大，通过对中原油田调整井地层复杂情况及漏失特点的分析，认为防漏是复杂区块调整井成功的关键，主要体现在防漏技术、配方、密度、流变性能、固控、起下钻措施等方面。
This paper is to study mechanical processing Z3040 radial drill in common use in the traditional electric control system transformation problem.
本论文是研究机械加工中常用的Z3040摇臂钻床传统电气控制系统的改造问题。
In this paper, the structure feature and principle of this special drill has been introduced. Its special design is very useful for drilling thin-wall pipe.
本文介绍了薄壁管专用钻头的结构特点及工作原理，其结构设计新颖，对薄壁管的钻削有实用价值。
This paper mostly studies the spiral configuration of the country standard twist drill concretely.
本文主要对国家标准麻花钻螺旋的结构作具体分析和研究。
This paper by means of different locations inertia moment of different directions and bending of the drill, analyses its bending rigidity.
本文利用钻头不同位置不同方向的惯性矩和挠曲对其弯曲刚性进行解析。
The paper analyses each parts of rotary mechanism of rotary drill rig.
本文针对钻机回转机构的各零部件进行一定分析。
In addition, this paper discusses the developing trend of mountain drill.
另外，本文还对山地钻机的发展趋势进行了探讨。
Aim at the problem of that the four meter drill press is difficult to fit drill plate, this paper designs a special following drill plate.
针对四米数控钻床无法安装钻模的问题，专门为其设计了一种随动式钻模。
This paper introduces feature and material characteristic of aluminum drill pipe and analyzes its application.
介绍了铝合金钻杆的结构特点和材料特性，分析了其适用范围。
This paper describes the mathematical model derivation of gun drill point with planar flanks, for given sets of design parameters.
本文根据选定的枪钻设计参数，导出平面型后刀面枪钻钻尖的数学模型。
This paper established the mathematical model of SPLIT drill basing on the involute cylindrical surface, and conducted real edge grinding.
本文建立了基于渐开圆柱面的SPLIT钻数学模型，并进行了实际刃磨。
A novel drill tool threaded connection stress relief groove is proposed in the paper.
减少连接螺纹弯曲应力可以延长钻具连接螺纹的疲劳寿命。
This paper studys noise produced by portable electric drill on theory and experiment. It can help find methods of reducing portable electric drill noise.
从实验和理论上研究了手提电钻在工作时产生噪音的主要噪声源及其特点，为减少其噪音提供了依据。
This paper illustrates the principle of the inner cone grinding twist drill and the process of grinding experiments on the tool grinder.
阐述了内锥面法刃磨麻花钻的原理以及在工具磨床上进行磨削工艺试验的方法。
In this paper, the controlling system to improve ordinary vertical drill to automatic drilling machine based on PLC is introduced, and the automatic drill is suitable for batch production.
本文给出了用可编程控制器(PLC)将普通立式钻床改造成可批量加工的专用自动钻床的控制方法。
This paper analyses the influence of excentric shaft connection on force case of drill tool, and discusses the causes of drill tool failure.
文中分析了使用偏轴接头对钻具各部分受力情况的影响及导致钻具失效的原因。
The paper presents a three - dimensional static model of the whole drill-string, and the model is solved by finite - element method.
本文提出了整体钻柱三维静力学模型并利用有限元法求解。
The paper introduced the drill on structural design, operational principle, main features and its application.
介绍了该钻机的结构设计、工作原理、主要特点以及使用情况。
According to the cause of its wear and tear, some advice on the design and make of a small drill bit is presented in the paper.
文章根据小钻头破损的原因，对小钻头的设计、制造及其使用提出一些改进意见及措施。
In this paper, the metal flowing regularity of twist drill in rolling process has been researched, and it finds that the edge-line of the drill influenced the metal flow.
本文从工艺出发，探讨了钻头四辊扭轧过程中金属的流动规律，揭示了刃带对扭轧金属流动的影响。
Taishan JMZ150 is a new, hydro mechanical anchor drill. This paper presents the design, structure, parameters, characteristics and application examples of the drill.
泰山jmz150型钻机是一种新型的、液机结合的锚杆钻机。介绍了钻机的设计要求、结构、参数、特点及实际施工情况。
In this paper coordination hole drill, connection and quality control in assembling of vertical stabiliser made of all-composite are introduced.
本文就某机全复合材料垂直安定面的装配，介绍了实际工作中如何协调、制孔、装配连接和质量检查等方面的问题。
In this paper coordination hole drill, connection and quality control in assembling of vertical stabiliser made of all-composite are introduced.
本文就某机全复合材料垂直安定面的装配，介绍了实际工作中如何协调、制孔、装配连接和质量检查等方面的问题。
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