diamond drilling bit 金刚石钻头
core drilling bit 取心钻头
thin drilling bit 薄壁钻头
weight control on drilling bit 钻压控制
Stones Drilling Bit 石材钻头
drilling-bit wear 刀具磨损
PDC variable diameter drilling bit PDC变径钻头
Oil Drilling Bit Series 石油钻头系列
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A set of calculating formulae for vertical milling teeth of drilling bit cones is derived herein from cutting rows with Angle cutters.
本文从尖角铣刀割圆出发，拟出了一套钻头牙轮直铣齿的计算公式。
The single tooth cutting course of a PDC drilling bit is studied. The research is of great significance for improving PDC drilling bit design.
为了改进PD C钻头设计，在全尺寸试验的基础上，对PD C钻头单齿切削过程进行了试验研究。
The method could let us to select the drilling bit rapidly and make the deviation between the porosity pressure calculation and the real measure less than 10%.
该方法能快速优选钻头类型，使地层孔隙压力的计算与实测误差小于10 %。
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