摘要
文章介绍了一种新型小尺寸钻头 ,它主要由一个偏置的多锥形牙轮和一个圆柱形滚轮及两个牙掌组成。其工作原理不同于球形单牙轮钻头 ,但是与三牙轮钻头的工作原理相同 ,主要依靠钻头牙轮牙齿的冲击和压入来破碎岩石 ,并且由圆柱形滚轮来修整井壁 ,还有两个靠近井底的喷嘴。与相同钻头尺寸的三牙轮钻头相比 ,该新型钻头的牙轮尺寸和轴承尺寸要大得多 ,因此 ,它可以承受较大的钻压 ,从而可以提高轴承和牙轮的使用寿命 ,进而提高机械钻速和钻头的使用寿命。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,a new small sized bit is introduced.The bit is mainly composed of a biassed polyconic cutter,a cylindric roller and two bit legs.The operating principle of the bit is different to that of spherical zublin simplex bit,but is identical with that of three cone bit,namely it breaks rocks mainly through impact and press in by the cutter teeth and then the borehole wall is repaired by a cylindric roller and two injecting nozzles close to the bottom hole.The new bit′s cone and bearing are much larger than those of the three cone bit with the same size,therefore the new bit can bear a greater WOB,thus,the life of the bearing and cone can be prolonged and then the penetration rate can be raised and the length of bit run prolonged.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.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2000年第2期45-48,共4页
Natural Gas Industry
关键词
牙轮钻头
岩石破碎设计
钻头
钻井
Roller bit,Rock breaking,Design,Experiment,Research
