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Needless to say at that price I went home with 3 different ones. It was quite worn but sharpened up with my small diamond stone and did the job. I did most of them in my drill press but moved over to the mill as my drill press won't get the center holes.

不用说在这个价格我到家里， 3种不同的，这是相当破旧，但激化了与我的小钻石石和没有工作，我没有他们大多在我的钻床，但移动到轧机作为我的钻床将得不到中心孔。

In this paper, ADAMS and ANSYS software are used to build the model of drill stem and dynamically simulate the distortion of drill stem in vertical well.

本文利用ADAMS软件和ANSYS软件，建立了钻柱模型，动态模拟了垂直井眼中钻柱的受力变形，直观准确地再现了钻柱与套管壁接触的全过程。

Considering the complex influence factors for the failure of drill stem,an analytic model for failure of drill stem based on support vector machine and cluster analysis theory was established.

针对钻具失效影响因素比较复杂的问题，建立了基于支持向量机和聚类分析理论的钻具失效原因分析模型。

In order to prevent abrasion and extend the service life, people deal with all kinds of researches. Now, people use a new method of preventing drill stem abrasion －Install non-rotating protector in the part near drill stem tie-in to solve this problem effectively.

为防止钻柱磨损和延长钻柱的使用寿命，人们从事了各种各样的研究工作，目前，工程上采用了一种新型的防磨方法——在靠近钻柱接头的部位，安装非旋转防磨减断保护套，有效地解决了这个问题。

This method displays the whole process of the contact between drill stem and well wall, and gives contact points and contact forces. It provides a reliable and practical aidlifetime of the drill stem. The method presented in this paper may also be adapand extended reach well drilling.

为实钻时，防止钻柱磨损和对钻柱寿命的预测提供了依据，对钻柱的结构设计以及钻柱力学的研究具有一定指导意义，本方法适用性强也可应用于定向井、大位移井等同类问题的研究。

In the existing buckling analysis of drill stem in horizontal condition,the drill stem is thought of as an even rod with equal diameter and sticked on the below wall of well on the action of deadweight,so it was simplified as simply supported beam compressed axially and supported evenly along its length by well wall.

在现有的水平状态下钻柱屈曲研究中，一般把钻柱看作均匀的等直径杆，认为钻柱在其自重的作用下，紧贴下井壁，因而通常把水平状态下的钻柱简化为在整个长度上受到井壁均匀支承的轴向受压的简支梁。

This method displays the whole process of the contact between drill stem and casing-pipe wall. Gradual simulation is used to dynamically simulate the best position of appending non-rotating drill stem protector. By this way, we can find out contact points and contact force, then make certain the position and number of installing protector.

并采用逐步模拟法，对钻柱添加非旋转防磨减断保护套的最佳位置进行仿真分析，得到钻柱与套管壁的接触区域及接触力，确定非旋转防磨减断保护套的安装位置以及所需安装的数量，为合理使用非旋转防磨减断保护套提供理论依据和前提。

This article introduces an easy way of deep machining and puts forward taking use of normal machine tool,simplifying craft installment,improving twist drill and connection types of drill stem by analyzing many influent factors on deep machining,which include discharging scrap,wear and tear,radiating and orientation.

本文介绍了一种简便的深孔加工方法，通过对深孔加工中排屑、磨损、散热和导向等诸多因素的分析，提出了利用普通机床，简易工装，改进麻花钻及钻杆的连接形式，在实践使用中取得了较好的效果。

The main products are standard twist drill stem Cone, Cone handles longer, long twist drill, various types of machine, hand cutter knife, the special-shaped cutter and the non-standard tool.

主要产品有锥柄标准麻花钻，锥柄加长，特长麻花钻，各类机用，手用绞刀，铣刀以及非标准的异型符合刀具。

The main products are:"30 mm, 26 mm-mm, 24 mm and 20 mm hammer; 13 mm, 10 mm, and 6 mm electric drill and impact drill; 110 millimeters marble cutter, 100 ~ 150 mm series of angular grinding ray machine, electric saw, sanding machine."

主要产品有："30毫米、26毫米毫米、24毫米、和20毫米电锤；13毫米、10毫米、和6毫米电钻及冲击钻；110毫米云石切割机、100~150毫米系列角向磨光机、电圆锯、砂光机等。"

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。