绳索取心钻进中顶漏钻进工艺实践
投稿时间:2020-12-10  修订日期:2021-05-06  点此下载全文
引用本文:王发民,魏和平,訾兵,等.绳索取心钻进中顶漏钻进工艺实践[J].钻探工程,2021,48(9):88-92.
WANG Famin,WEI Heping,ZI Bing,et al. Blind drilling technology in wire-line core drilling[J]. Drilling Engineering, 2021,48(9):88-92.
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作者单位E-mail
王发民 宁夏地质矿产勘查院宁夏 银川 750021 wd040516@163.com 
魏和平 宁夏地质矿产勘查院宁夏 银川 750021  
訾兵 宁夏核工业地质勘查院宁夏 银川 750021  
张宁 宁夏地质矿产勘查院宁夏 银川 750021  
王卫 宁夏地质矿产勘查院宁夏 银川 750021  
基金项目:宁夏自然资源厅地方急需矿产资源勘查项目(编号:2020NCZ000542)
中文摘要:2020年,宁夏地质矿产勘查院在宁夏中宁县烟洞山地区实施了50个石灰岩勘查钻孔。由于该矿区灰岩地层裂隙发育,普遍存在严重漏失现象,绝大多数钻孔出现冲洗液失返性漏失,施工初期,发生了2起烧钻事故,钻探成本居高不下。为了完成钻探施工任务和节约成本,项目组从钻孔结构、钻头选型、钻进参数及泵量优化入手,摸索出一套绳索取心钻进中的顶漏钻进施工工艺,采用清水代替冲洗液,同时严格控制各项钻进技术参数,顺利完成了全部钻探施工任务,平均台月效率883 m,平均岩心采取率98%,有效提高了施工效率,降低了钻探成本,为地方发展提供了有力资源保障。
中文关键词:漏失地层  失返性漏失  顶漏钻进  绳索取心钻进
 
Blind drilling technology in wire-line core drilling
Abstract:In 2020, 50 boreholes were drilled for limestone exploration in the Yandong Mountain area of Zhongning county by Geology and Mineral Exploration Academy of Ningxia. With presence of well developed fractures in limestone strata in this mining area, serious circulation loss problems were common, and total circulation loss was encountered in most of the boreholes, which resulted in two bit burning accidents in the early stage of drilling and increased drilling cost. In order to complete drilling tasks and save drilling cost, a blind drilling process was explored through addressing the borehole structure, bit selection, drilling parameters and pump rate optimization, where fresh water was used for drilling fluid with strict control of various drilling parameters. As a result, all drilling tasks were successfully completed with average rig-month efficiency of 883m, and average core recovery of 98%. The process has effectively improved drilling efficiency, and reduced drilling cost, providing strong resource support for local development.
keywords:lost-circulation formation  lost return leakage  blind drilling  wire-line core drilling
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