论文部分内容阅读
为了提高金刚石钻头在坚硬致密、弱研磨性地层的钻进效率,将弱化胎体耐磨损性能理论与切削齿非光滑设计相结合,制作钻头进行现场试验并对胎体进行扫描电镜分析.研究结果表明:在胎体中添加适当浓度的胎体弱化颗粒,有利于提高钻头的钻速;经胎体耐磨性弱化处理的钻头在钻进过程中,弱化颗粒易于从胎体表面脱落,使其表面形成微观非光滑形态,提高了钻头唇面与岩石的单位面积压力,增加了孔底岩粉的研磨能力,促进了胎体中新颗粒金刚石的出刃;弱化颗粒浓度存在一个较优的设计范围,过高或过低都不利于提高钻头的钻进效率和使用寿命.
In order to improve the drilling efficiency of diamond drill bit in hard, dense and weakly abrasive formations, the wearable carcass wear resistance theory was combined with the non-smooth cutting tooth design to make drill bit for field test and scanning electron microscope analysis of the carcass. The results show that adding appropriate concentration of matrix weakening particles to the carcass is beneficial to increase the drilling speed of the drill bit. During the drilling process, the weakened particles tend to fall off the carcass surface through the weakening of the wear resistance of the carcass The surface forms a microscopic and non-smooth shape, which increases the unit area pressure of the drill lip and the rock, increases the grinding ability of the rock bottom powder, and promotes the exit edge of the new granular diamond in the carcass. There exists a better design of the weakened particle concentration Range, too high or too low are not conducive to improving the drilling bit drilling efficiency and service life.