KT178取心钻具在共和干热岩钻井中的应用
投稿时间:2020-08-18  修订日期:2020-11-19  点此下载全文
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张恒春 中国地质科学院勘探技术研究所 065000
王稳石 中国地质科学院勘探技术研究所 065000
李宽 中国地质科学院勘探技术研究所 065000
王跃伟 中国地质科学院勘探技术研究所 065000
闫家 中国地质科学院勘探技术研究所 065000
曹龙龙 中国地质科学院勘探技术研究所 065000
胡晨 中国地质科学院勘探技术研究所 065000
中文摘要:共和干热岩资源富集于花岗岩地层,硬度高,研磨性强,部分层段裂隙发育,取心困难。针对干热岩地层和取心需求特点,研制一套KT178取心钻具,并配套设计了孕镶金刚石取心钻头。该钻具为单动双管取心钻具,可配套井底动力钻具使用,设计中注重对钻具外管、卡簧等关键部件的强度校核。在GH-01井和GH-02井中,经过两轮实验和优化,钻具逐渐成熟,获取了较完整的岩心样本,满足干热岩勘探取心要求,具备了向页岩气、水资源勘察等具有间断取心需求的同类工程推广应用的条件。
中文关键词:干热岩  取心钻具  取心钻头  坚硬地层
 
Application of KT178 core tool in Gonghe hot dry rock exploratory well
Abstract:In Gonghe basin, hot dry rock resources are enriched in granite strata. Core drilling is difficult in the formation, which is hard and abrasive, and cracks are developed in some layers. According to the characteristics of hot dry rock formation and coring demand, the KT178 coring tool was developed, and impregnated diamond coring bit was designed. The drilling tool is a swivel type double tube core barrel, which can be used with down-hole motor. The strength check of key components such as outer barrel and core catcher is emphasized in the design. In Wells GH-01 and GH-02, after two rounds of experiments and optimization, the drilling tools are gradually mature. More complete core samples are obtained by the drilling tools, which can meet the requirements of coring in hot dry rock exploration. The drilling tools have the conditions to be popularized and applied to similar projects with intermittent coring requirements, such as shale gas and water resources exploration.
keywords:hot dry rock  core drilling  coring tool  coring bit  hard formation
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