复杂地层用绳索取心钻具的研制
投稿时间:2019-03-12  修订日期:2019-12-28  点此下载全文
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作者单位E-mail
尹国明 中国地质大学<
北京>
 
yinyi21@qq.com 
郎猛 中国地质大学<
北京>
 
 
陈志鹏 中国地质大学<
北京>
 
 
张龙 中国地质大学<
北京>
 
 
李然然 中国地质大学<
北京>
 
 
李国民 中国地质大学<
北京>
 
ligm@cugb.edu.cn 
基金项目:国土资源部深部地质钻探技术重点实验室开放课题
中文摘要:当常规绳索取心钻具遇到复杂地层时,岩矿心的采取率低,其原因主要有两点,一是钻具防水性能差,遇到松散软的地层时,岩心没有进入岩心管时就被冲洗液冲蚀掉,二是钻具防岩心脱落性能不好,遇到硬脆碎地层时,虽然岩心能够进入岩心管,但卡簧对破碎的岩心卡固不牢,很容易脱落。在复杂地层中,使用绳索取心钻具可以解决这两大问题,并使绳索取心钻进的优越性得到充分的发挥。
中文关键词:复杂地层  绳索取心  钻具
 
Development of Wire-line Drilling Tool for Complex Stratum
Abstract:Using the conventional wire-line drilling tool in complex stratum always leads to a low percent recovery of rock core. There are two main reasons. Firstly, because of the bad waterproofness of conventional wire-line drilling tool, the core was carried away by flushing fluid before entering the core barrel during drilling in loose soft stratum. Secondly, the performance of preventing core loss is also bad, although the core can enter into core barrel in hard brittle broken stratum, but it is not locked tightly by circlip which leads to falling off. The design of Wire-line drilling tool in complex stratum mainly to solve these two problems, which can fully improve the superiority of the wire-line drilling.
keywords:complex stratum  wire-line drilling  drilling tool
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