A new method of combined rock drilling

作     者：Tang Jiren Lu Yiyu Ge Zhaolong Xia Binwei Sun Huijuan Du Peng 

作者机构：State Key Laboratory of Coal Mine Disaster Dynamics and ControlChongqing University National & Local Joint Engineering Laboratory of Gas Drainage in Complex Coal SeamChongqing University Mechanical Engineering CollegeChongqing Industry Polytechnic College 

出 版 物：《International Journal of Mining Science and Technology》 (矿业科学技术学报（英文版）)

年 卷 期：2014年第24卷第1期

页      面：1-6页

核心收录：

学科分类：0820[工学-石油与天然气工程] 082001[工学-油气井工程] 08[工学] 

基　　金：supported by the Fundamental Research Funds for the Central University (Nos.CDJZR10248801,CDJZR122488 01) the National Natural Science Foundation of China (No.51104191) 

主　　题：Gas extraction Drilling Abrasive water jet Mechanical bit 

摘      要：Based on the technologies of traditionally mechanical drilling and water jet,we propose a new method of abrasive water jet in combination with rock drilling,and establish a combined rock drilling system for the gas *** study chose the common sandstone and silicon limestone as the rock sample.A series of experiments were completed in the case of dry drilling,existing technology drilling,combined drilling with high pressure water jet and combined drilling with abrasive water jet,*** drilling efficiency and performance were contrasted and analyzed in *** results indicate that it is better to choose the method of combined drilling with the high-pressure water jet for soft *** method of combined drilling with abrasive water jet is feasible for the hard rock drilling and has higher drilling efficiency and *** this paper,compared with the existing technology,the drilling depth has increased by about 65%,the axial force and torque have reduced by about 14%and 17%,respectively,and the drill wear reduces obviously in the same conditions.