囊袋式取心钻具的设计与应用  

Design and application of bag-type coring tool

作　　者：赵哲睿[1] 张绍和[1,2] 燕建龙 ZHAO Zherui;ZHANG Shaohe;YAN Jianlong(College of Geology and Environmental Engineering, Central South University, Changsha 410083, China;Key Laboratory of Non-Ferrous Metal Ore Forecast of the Ministry of Education, Changsha 410083, China;Northwest Comprehensive Survey and Design Institute, Xi’an 710003, China)

机构地区：[1]中南大学地球科学与信息物理学院,湖南长沙410083 [2]有色金属成矿预测教育部重点实验室,湖南长沙410083 [3]西北综合勘察设计研究院,陕西西安710003

出　　处：《煤田地质与勘探》2017年第3期162-164,169,共4页Coal Geology & Exploration

基　　金：湖南省自然科学基金项目(07JJ6089)~~

摘　　要：如何提高岩(矿)心采取率是钻探工程施工中关注的重要问题之一。针对在钻探中经常遇到的岩(矿)心采取率低的问题,设计了一套钻探工程施工用囊袋式双管取心钻具。该钻具能利用双管中的塑料囊袋结构满足在极破碎、易冲蚀、极软弱、水敏性等地层中钻探施工实现高取心率的要求,在进行双管钻进工艺且不需增加其他钻探设备的前提下,实现岩心采取率达到90%以上。How to improve the coring recovery rate is one of the important problems of concern in drilling engineering,this paper describes the design of a bag-type double-barreled coring tool for engineering survey and geological drilling.This coring tool can use the plastic bags in the double-barreled structure to keep coring recovery rate in very broken,easy washout,very soft,water sensitive stratum.Under precondition of using double-barreled coring tool without adding other drilling equipment,the core recovery rate reaches above90%.

关 键 词：破碎地层 岩心采取率 单动双管钻具 囊袋式 超前侧喷钻头 

分 类 号：P634.4[天文地球—地质矿产勘探]