保证三牙轮钻头的直径是钻头制造工艺的重点。
Diameter controlling is of great importance in rock bit manufacturing.
本文阐述了三牙轮钻头滑动轴承载荷的测试方法。
A method of determining the load on journal bearing of three-cone bit is described in this paper.
通过大量的现场试验，得出三牙轮钻头三喷嘴优化组合的经验比值。
The experiential ratio of optimum combination of three nozzles on tri cone bit is obtained based on many field experiments.
三牙轮钻头主要零件形状复杂，影响钻头直径及牙轮齿圈啮合误差的因素较多。
There are many factors influencing the bit diameter and the tooth row intermesh due to the complicated shapes of the main parts of a three cone bit.
本文以三牙轮钻头的台架试验和油气田现场试验的效果为依据，探讨三牙轮钻头的改进方向。
In this paper, on the basis of the results obtained from the bench and field tests of the three roller bit, its improving direction is approached.
三牙轮钻头结构复杂，其中齿面结构直接与地层接触，对于岩石破碎过程和钻头工作性能的影响最大。
The structure of tri-cone rock bit is complicated. As the cutting structure touch the stratum directly, it affects the process of breaking rock and the performance of tri-cone rock 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 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.
三牙轮钻头地面台架试验与井底模式的分析是对牙轮钻头设计的合理性进行检验与改进的最简便又较真实的方法。
The bench test of three-cone bits and analysis of their bottom hole patterns are the simplest and useful means of checking and improving their design.
针对三牙轮钻头传统的二维啮合设计方法的低效率和二维啮合图的不真实性，开发出一个三牙轮钻头啮合设计新程序。
In the light of the inefficiency of the conventional 2 - D engagement design method for tricone bits and the untruth of the 2 - D engagement chart, a new Program for bit engagement design is develope.
本文就三牙轮钻头滚动轴承滚子与外圈之间的接触应力进行了详细的分析，得出各种类型轴承滚子的接触应力分析情况。
This paper analyses the contact stress between the rollers and the outer track of roller bearing in detail, and then concludes the contact stress of all kinds of the bearing rollers.
建立了牙轮钻头的球形齿、楔形齿和勺形齿三维空间的几何模型；
Geometry model of roller bit's sphere tooth, wedgy tooth and bucket shape tooth were established;
发现一个牙轮钻头中的三个牙轮回转速度不相同。而不同类型牙轮钻头的牙轮转速也不相同。
It was found that the rotation speeds of 3 cones in one rotary bit are different, and the speeds of rotation are also different for different types of rock bits.
发现一个牙轮钻头中的三个牙轮回转速度不相同。而不同类型牙轮钻头的牙轮转速也不相同。
It was found that the rotation speeds of 3 cones in one rotary bit are different, and the speeds of rotation are also different for different types of rock bits.
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