坚硬致密弱研磨性地层孕镶金刚石钻头性能优化  

Performance optimization of diamond-impregnated bit for extra-hard and strong-abrasive rocks

作　　者：王佳亮[1] 张绍和[2] WANG Jialiang;ZHANG Shaohe(Hunan University of Science and Technology, Hunan Provincial Key Laboratory of Equipment and Technology for Oceanic Mineral Resources, Xiangtan 411201, China;College of Geology and Environmental Engineering, Central South University, Changsha 410083, China)

机构地区：[1]湖南科技大学海洋矿产资源探采装备与技术湖南省工程实验室,湖南湘潭411201 [2]中南大学地球科学与信息物理学院,湖南长沙410083

出　　处：《煤田地质与勘探》2016年第6期159-163,共5页Coal Geology & Exploration

基　　金：湖南科技大学科研项目(E51680)~~

摘　　要：基于金刚石钻头在坚硬致密弱研磨性地层钻进时易出现进尺效率低的现象，将SiC磨粒作为胎体耐磨损性弱化颗粒添加至胎体中，采用室内钻进及正交试验设计法从金刚石粒度、金刚石浓度、胎体耐磨损性弱化颗粒浓度、胎体硬度4方面对钻头性能进行优化，并探讨了钻进工艺参数对钻进效率的影响。结果表明：将适当材质的胎体耐磨损性弱化颗粒添加至钻头胎体中，能够有效提高钻头的钻进效率，避免钻头打滑的现象；胎体硬度HRC25，金刚石粒度40/50目、金刚石体积分数55%，胎体弱化颗粒体积分数30%是本次试验最优的设计方案；在相同主轴转速条件下，轴向压力不宜超过3.5MPa，在相同轴向压力的条件下，其主轴转速以750~850r/min为宜。On account of the phenomenon that the drilling footage is low when diamond bit is used to drill hard compact abrasive rocks, SiC particles are added into matrix as abrasion-weakening particles. By using lab drilling and orthogonal test, the performance of bit was optimized in the aspects of diamond size, concentration of abrasion-weakening particles, hardness of matrix. The influence of drilling technological parameters on drilling efficiency was discussed. The results showed that adding abrasion-weakening particles with proper texture into bit matrix can enhance drilling efficiency and avoid bit slipping; the optimal designing scheme of the test was hardness HRC 25, diamond particle size 40/50 mesh, diamond concentration 55%, abrasion-weakening particle concentration 30%; at the same spindle speed, axial compressive force should not exceed 3.5 MPa. Under the same axial compressive force, the apropriate spindle speed isd is 750 to 850 r/min.

关 键 词：正交试验法 孕镶金刚石钻头 碎岩机理 胎体弱化颗粒 打滑地层 

分 类 号：TG115[金属学及工艺—物理冶金]