cone type roller bearing rock bit
滚柱轴承锥形牙轮钻头
Load carrying ability of tapered roller bearing on new high speed rock bit
新型高速牙轮钻头圆锥滚子轴承承载能力分析
bridge of the bit
四牙轮钻头牙轮支架
Blast hole tricone rock bits
GB/T13343-1992矿用三牙轮钻头
insert rock bit
镶硬合金齿牙轮钻头
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
4.14 Drilling with cone (drag) bit in the section.
此段地层采用牙轮（刮刀）钻头钻进。
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
Drilling with cone( drag) bit in the section.
此段地层采用牙轮（刀）头钻进。
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
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
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
The new-type mono-metal floating seal for roller bit
牙轮钻头用新型单金属浮动密封研究
Simulation model of drilling process of three-cone bit
三牙轮钻头破岩过程计算机仿真模型
Method of Calculating Three Cone Bit Diameter by Using Excel
用Excel实现三牙轮钻头直径计算的方法
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
The vertical Interaction Model of cone Bit Teeth-rock
牙轮钻头牙齿与岩石垂向互作用仿真模型
TEST STUDY OF A NEW TYPE NON-SEAL SLIDING BEARING CONE BIT
新型非密封滑动轴承牙轮钻头的试验研究