点胶法可实现金刚石有序排布进而提高钻头性能

摘要

为实现孕镶金刚石钻头工作层中金刚石颗粒的有序排列,采用点胶法进行金刚石有序排布的初步实验.基于Matlab2016A图像分析技术,对金刚石定位精度进行定量评价;然后制备金刚石颗粒有序排布的单层电镀金刚石钻头,并与普通电镀钻头进行对比钻进实验.结果表明:点胶法可以得到与设计坐标偏离值不超过10%的金刚石有序排布阵列;有序排布的金刚石钻头,其钻进时效比普通钻头的高30%,钻头寿命长85%.采用点胶法制备有序排布金刚石钻头是可行的;相比于随机分布,有序排布具有明显的优势.%To orderly arrange diamond grits in impregnated diamond bits, dispensing is applied in preliminary experiments on arranging diamond grits.Matlab2016A image analysis tech provides a quantitative evaluation scheme of grit positioning accuracy.Then a single layer electroplated diamond bit with orderly arranged grits is prepared to compare its performance with that of common bits in actual drilling.Results show that dispensing helps to orderly arrange diamond grits, whose deviation ratio over the design scheme is less than 10%, and that grit-arranged bit performs 30% increase in efficience and 85% in bit life than common bits.In conclusion, dispensing method is reliable to orderly arrange diamond grits in a bit, who has significant advantage over common bits.