查询词典 a little bit

In this paper,the situation and data in the test on testing table are presented,which are compared with those of three cone bit,obtaining an important result in applying this kind of bit.

文中介绍了在试验台上的试验情况和数据，并与三牙轮钻头进行了比较，得出了应用该钻头的重要结论。

In this paper, the vibration characters of the Roller Cone Rock Bit which are caused by interaction bit/formation and elastic deformation are analyzed and studied deeply and in detail.

本文对在钻井过程中由于牙轮钻头与岩石互作用及钻柱的弹性变形导致牙轮钻头和钻柱在钻井过程的振动问题进行了深入地分析研究。

In this paper, using the method of computer simulation, on the basis of the cone bit geometry and inematics models and the interaction model of bit and rock, the established models are solved through the MATALB programming.

利用计算机仿真方法，在已建立的牙轮钻头几何学、运动学模型和钻头与岩石互作用模型的基础上，通过MATLAB 编程，求解所建立的各模型。

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

The use of the web to spread fears that flicking the switch on the LHC could create a Black Hole that could swallow up the Earth particularly concerned him, he said.

他说，使用互联网散布恐慌说启动LHC会生成一个可能吞噬地球的黑洞的做法让他感到忧虑。

Not a single word have I written down.

我一个字也没有写下来。