小直径随钻定向纠斜技术在地质勘探中的应用  

The Application of Small Diameter Directional Deviation Correction Technology while Drilling to Geological Exploration

作　　者：吴金生[1] 罗显梁 张统得[1] 蒋炳 李晓晨 WU Jin-sheng;LUO Xian-liang;ZHANG Tong-de;JIANG Bing;LI Xiao-chen(Institute of Exploration Technology,Chinese Academy of Geological Sciences,Chengdu 611734;Sichuan Natural Resources Investment Group Co.,Ltd,Chengdu 610051)

机构地区：[1]中国地质科学院探矿工艺研究所,成都611734 [2]四川省自然资源投资集团有限责任公司,成都610051

出　　处：《四川地质学报》2022年第S01期56-61,共6页Acta Geologica Sichuan

基　　金：中国地质调查局项目:深海钻探与工程支撑(探矿工艺所)DD20190857;青海共和干热岩调查评价与勘察示范(探矿工艺所)DD20201104。

摘　　要：深孔小直径地质岩心钻探经常出现岩矿层产状较陡,地质构造复杂,地层软硬不均,钻孔方向与岩层夹角影响因素,采用普通绳索取心钻进,钻具刚性小,常增大钻头外径,减小环空压力,因此,环空间隙较大,极易发生孔斜,致使钻具折断,绳索取心钻进施工困难,达不到地质设计要求。为解决小直径深孔地质岩心钻探孔斜难题,探矿工艺所开展了小直径深孔有缆随钻定向纠斜技术研究,采用螺杆马达/有缆随钻定向钻进纠斜技术在多个矿区成功实施了随钻定向纠斜,取得较好的应用效果,实现地质目标,具有示范与推广作用。Deep-hole small-diameter geological core drilling is often used to drill for steep dip formations with complex structure and characterized by larger annular space,frequent borehole deviation and drill-string partial accident and difficult drilling.The study of small diameter deep hole cable while drilling directional deviation correction technology is carries out by the Institute of Exploration Technology which uses screw motor/cable directional deviation correction technology while drilling in multiple mines and obtains good application effect.

关 键 词：小直径深孔 绳索取心 随钻定向纠斜 示范与推广 

分 类 号：P634.7[天文地球—地质矿产勘探]