查询词典 bit

The dynamics of roller cone bit under the interaction of drilling string,bit and rock during the drilling process was investigated.

摘要研究了钻井过程中钻柱、钻头、岩石相互作用下的牙轮钻头动力学特性。

The dynamics of roller cone bit under the interaction of drilling string,bit and rock during the drilling process was investigated.

研究了钻井过程中钻柱、钻头、岩石相互作用下的牙轮钻头动力学特性。

According to achievements in research, using face-radial sealing structures can adapt to the developing trend of increasing rotary speed of cone bit to a certain extent in lubricating system of bearing seal, which is cramp to bit service life.

本文的研究表明，在伟l约钻头寿命的轴承密封润滑系统中，采用端面一径向组合密封结构能够在一定程度上适应牙轮钻头转速提高的发展趋

Compared with the roller cone bit at the same interval of the same area, the new bit shows significant economical and social benefits by an increase of 290% for average footage and a rise of 77.8% for average ROP.

现场试验证明与同地区同井段使用的牙轮钻头相比：平均进尺提高了2.9倍，平均机械钻速提高了77.8％，具有明显的经济效益和社会效益。

A feature model is set up first by Pro/E software based on the design feature of the bit, then by using Pro/Program tool, the parametrization design of the cone bit is achieved and the corresponding programs is worked out, which can promote the design efficiency and quality as well as decrease the design cost.

设计中，根据牙轮钻头的结构特点，用Pro/E软件建立特征模型，然后利用Pro/E的Program模块编程，采用数据文件与Pro/E模型交换数据，达到从特征模型中根据用户输入的参数而自动地在Pro/E中生成牙轮钻头的三维实体和二维加工图的目的，从而使设计人员从大量繁琐的绘图及计算工作中解脱出来。

PDC bit technology is fine-tuned for specific formations located in fields traditionally dominated by roller cone bit applications.

简介：最近，史密斯钻头公司推出一种PDC钻头技术，它专门用来钻坚硬的碳酸盐岩和耐磨的砂岩地层。

This kind of quartz stone cutting tool is a technological innovation product, the design structure is novel, it change the use of sole grade grinding compound which is already a traditional manufacture method, it simultaneously used the rough and fine grain grinding compound in the cutting tool different part, ie, by the electricity chromium welded skill, weld the large grain diamond grinding compound on the tool bit top (4050 #) and weld the tool bit both sides the metal polish fine grain grinding compound which the nominal grade value is one level up smaller than large grain grinding compound 100-120

这种石材切具属一项技术创新产品，设计结构新颖，这在于它改变了使用单一粒级磨料的传统制作方法，而是在切具刀头不同部位同时使用粗细粒磨料，也就是在刀头顶面和刀头两侧由电铬焊合艺分别同定粗粒金刚石磨料(4050目)和标称粒级值小于粗粒磨料一级以上的金属抛光用细粒磨料100-120目

This kind of stone cutting tool is a technological innovation product, the design structure is novel, it change the use of sole grade grinding compound which is already a traditional manufacture method, it simultaneously used the rough and fine grain grinding compound in the cutting tool different part, ie, granite tile by the electricity chromium welded skill, weld the large grain diamond grinding compound on the tool bit top (4050 #) and weld the tool bit both sides the metal polish fine grain grinding compound which the nominal grade value is one level up smaller than large grain grinding compound 100-120

这种石材切具属一项技术创新产品，设计结构新颖，这在于它改变了使用单一粒级磨料的传统制作方法，而是在切具刀头不同部位同时使用粗细粒磨料，也就是在刀头顶面和刀头两侧由电铬焊合艺分别同定粗粒金刚石磨料(4050目)和标称粒级值小于粗粒磨料一级以上的金属抛光用细粒磨料100-120目

The front of the teahouse, a stand and sell acid Kok (I do not know what a tree node, the shape a bit like acacia, very acid, importers people Cuanmei), Shui date (end of the tree is, should be regarded as fruit, Zhuangrujizhua, a lump of a lump in some areas, that is called chicken Jiaozhao, taste Henguai, such as brown sugar, a bit like licorice) and the bubble pears sugar pears in the saline water, the pear flavor is equipped with, Kunming people Quepian in fresh and salt water within the bubble.

这家茶馆门前，有一个小摊，卖酸角(不知什么树上结的，形状有点像皂荚，极酸，入口使人攒眉)、拐枣(也是树上结的，应该算是果子，状如鸡爪，一疙瘩一疙瘩的，有的地方即叫做鸡脚爪，味道很怪，像红糖，又有点像甘草)和泡梨糖梨泡在盐水里，梨味本是酸甜的，昆明人却偏于盐水内泡而食之。

In this paper, a simple method and procedure is given by which cone radius, journal angle, diameter and leg datum point size of a rock bit can be calculated respectively according to geometric relations of rock bit structure parameters.

本文给出一种根据牙轮钻头结构参数间的几何关系分别计算牙轮半径，牙爪轴倾角，牙掌基准尺寸，牙轮背锥角和钻头直径的方法及程序。

This matter overthrew all basises I learned from Sunday school .

这件事把我从周日学校学到的所有道理都颠覆了。

It's one of the cruel ironies of aging: if you want to remember your favorite restaurants, the less you should eat at them.

这是一个老化的残酷讽刺：如果你想记住你最喜欢的餐馆，你应该更少吃到它们。