孕镶金刚石钻头钻进花岗岩岩屑特性室内试验研究  

Experimental study on rock cutting characteristics of granite broken by impregnated diamond bit

作　　者：康鑫 段隆臣[2] 刘卫卫 谭松成[2] 和大钊 KANG Xin;DUAN Long chen;LIU Weiwei;TAN Songcheng;HE Dazhao(Jinan Institute of Survey and Investigation,Jinan 250000,China;Engineering Faculty,China University of Geosciences,Wuhan,430074 China)

机构地区：[1]济南市勘察测绘研究院,济南250000 [2]中国地质大学(武汉)工程学院,武汉430074

出　　处：《金刚石与磨料磨具工程》2023年第1期23-28,共6页Diamond & Abrasives Engineering

摘　　要：岩屑的特征参数是影响其环空上返的一个重要因素。为研究孕镶金刚石钻头钻进花岗岩所产生的岩屑特性,开展室内微钻试验。研究发现碎岩产生的岩屑在一定范围内呈单峰值分布,且岩屑粒度分布范围与钻压、转速等钻进参数有关;在一定程度上岩屑峰值粒径随着钻压的增大而变大,随着转速的增大而变小。进一步显微观察岩屑形貌特征,发现岩屑颗粒基本小于岩石原矿物颗粒尺寸,且岩屑颗粒多呈单一矿物成分,较少有多种矿物相互混杂的岩屑颗粒;显微观察岩屑与岩石表面形貌特征,发现孕镶金刚石钻头钻进花岗岩时以体积破碎的方式为主、塑形微切削方式为辅。The characteristics of rock cuttings are important factors affecting their annulus upward return.The indoor micro drilling experiment was carried out to study the characteristics of rock cuttings produced by impregnated diamond bit breaking granite.It is found that the rock cuttings produced by broken rock show single peak distribution in a certain range,and that the distribution is related to drilling parameters such as WOB and rotating speed.To some extent,the peak particle size of cuttings increases with the increase of WOB and decreases with the increase of rotating speed.Further microscopic observation on the morphological characteristics of rock cuttings shows that the particle size of rock cuttings is basically smaller than that of original minerals,and that most of the rock cuttings are of single mineral composition.Further observation on the morphology characteristics of rock cuttings and rock surface shows that the impregnated diamond bit drilling granite is mainly in the form of volume crushing,supplemented by plastic micro cutting.

关 键 词：孕镶金刚石钻头 花岗岩 岩屑特性 钻进参数 室内试验 

分 类 号：P634[天文地球—地质矿产勘探]