小秦岭复杂地层潜孔锤反循环钻探技术试验研究.pdf

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1、2013年第4O卷第11期探矿工程(岩土钻掘工程)小秦岭复杂地层潜孔锤反循环钻探技术试验研究田敏，赵志强，曾石友，殷其雷，李金朋，杨宽才(1．河南省地矿局第四地质调查院，河南郑州450001；2．吉林大学建设工程学院，吉林长春130026)摘要：贯通式潜孔锤反循环连续取心钻进技术具有效率高、钻孑L质量好、钻探成本低等特点，尤其对复杂地层有较强的适应性。在反循环钻头及钻具进行优化组合的基础上，结合小秦岭金矿田程村矿区钻探项目开展野外生产试验。试验结果表明：潜孔锤反循环钻进系统对复杂地层条件适应性强，解决了该矿区的系列钻探技术难题。试验深化了对贯通式潜孔锤反循环钻探机理和反循环钻头结构的创新研究，

2、对贯通式潜孔锤及配套钻具的进一步合理优化，实现高效率、低成本、短工期和良好的地质利用效果提供了技术支撑。关键词：贯通式潜孔锤；反循环连续取心；复杂地层；小秦岭中图分类号：P634．56文献标识码：A文章编号：1672—7428(2013)11—0001—04ExperimentalResearchonReverseCirculationDrillingTechnologywithDTHAirHammerDrillBitsinComplexStratainXiaoqinlingArea／TIANMin‘，ZHAOZhi—qiang，ZENGShi—you，YINQi—lei，LIJin-peng

3、，YANGKuan—cai(1．TheFourthGeologicalExplorationInstituteofHenanGeologyandMineralBureau，ZhengzhouHenan450001，China；2．CollegeofConstructionEngeineering，JilinUniversity，ChangchunJilin13O026，China)Abstract：Thetechnologyofreversecirculationcontinuouscoringdrillingwithhollow—throughDTHhammerhasshownlotsofp

4、eculiarities，suchasthehighdrillingeficiency，goodqualityofboreholeandlowdrillingcost，especiallytheuniquea—daptabilitywhiledrillingincomplexstrata．Inthispaper，seriesoffieldtestshavebeenconductedonthebasisofoptimizedconfigurationofreversecirculationdrillbitsanddrillingtoolsaccordingtoTianchenggoldmined

5、rillingprojectinXiaoqin—lingarea．Thetestsresultshaveshownthatthemodifieddrillingsystemwithhollow-throughDTHhammercouldbeofhi．ghadaptabilitytodrillingincomplexconditions，whichcouldeffectivelysolvetheproblemsofdrillinginthisoredistrict．What’Smore，theresultscontributetothefurtherinnovativeresearchonthe

6、mechanismtheoryofhollow—throughDTHhammerandthestructuraldesignofreversecirculationdrillingbits．Inaddition，itcouldprovidetechnicalsupportsforthereasonableoptimizationofhollow—throughDTHhammeranddrillingtoolsconfigurationtoachievethehigheficiency，lowcost，shortperiodandsuperiordrillingeffectincomplexge

7、ologicalconditions．Keywords：hollow—throughDTHhammer；reversecirculationcontinuouscoring；complexstrata；Xiaoqinling1概述岩心样采取率高且不与孔壁接触，其岩矿心不富集，贯通式潜孔锤取心钻探技术是集潜孔锤碎岩、不贫化，品质优良；在水敏性及破碎复杂地层钻进流体介质全孔反循环、钻进中不停钻连续获取