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%.
作者
赵哲睿
张绍和
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)
出处
《煤田地质与勘探》
CAS
CSCD
北大核心
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)~~
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
fractured formation
coring recovery rate
double-barreled and single-acting coring tool
bag-type
advanced lateral jet bit
