1.
Application of Roller Bit Combination Drilling Technology in Nappe Strata of Qingxi Oilfield
牙轮钻头复合钻进在青西推覆体地层的应用
2.
insert rock bit
镶硬合金齿牙轮钻头
3.
4.14 Drilling with cone (drag) bit in the section.
此段地层采用牙轮（刮刀）钻头钻进。
4.
bridge of the bit
四牙轮钻头牙轮支架
5.
Study on the carburizing and niobiumizing process and the wearing resistance of the mine roller bit
矿用牙轮钻头碳-铌复合渗及耐磨性能研究
6.
Drilling with cone( drag) bit in the section.
此段地层采用牙轮（刀）头钻进。
7.
cone type roller bearing rock bit
滚柱轴承锥形牙轮钻头
8.
Blast hole tricone rock bits
GB/T13343-1992矿用三牙轮钻头
9.
Comparative analysis of drilling characteristics of dia- mond bits and roller bits
金刚石钻头与牙轮钻头钻井特点对比分析
10.
APPLICATION AND RESEACH-DEVELOPMENTOF WATER JET TECHNOLOGY IN ROCK BIT
水射流技术在牙轮钻头中的应用与研究进展
11.
Research Progress of the Surface Strengthening Technology on Roller Bit Metal Face Seal
牙轮钻头金属端面密封表面强化技术研究进展
12.
Boundary element method for stress analysis of tungsten carbide insert interface on cone bit
牙轮钻头镶齿结合面应力分析的边界元法
13.
Anti-seizing test of floating bush of cone bit slide bearing
三牙轮钻头滑动轴承浮动衬套的抗胶合试验
14.
unit-type drill head
组合钻床钻头, 标准钻头
15.
Research on the simulation of the tooth slippage of the cone bit
牙轮钻头牙齿滑移量规律的仿真研究
16.
AN APPLICATION OF ABRASIVE WATERJET INTO CUTTING OF CONE BIT
磨料水射流在切割牙轮钻头中的应用
17.
Prediction and evaluation of systematic reliability of tricone bit
三牙轮钻头系统可靠性的预测与评估
18.
The development and application of a new type rock bit with bearing liner structure;
镶套轴承结构牙轮钻头的开发与应用