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一、生产难关就是我们技术研究的课题辽宁×××铜矿区,地处太子河拗陷南翼边缘,风化带较深,折皱明显,断裂发育,挤压破碎带为该区主要含矿构造.地层岩性疏松,破碎,软硬频变,裂隙穿插.多数钻孔出现冲洗液漏失和孔壁坍塌超径等情况.部分钻孔有空洞,常有涌水、漏砂、缩径等变故发生.如果采取的措施不当,往往导致严重孔身事故或套管事故.开钻三年来,平均纯钻率没有突破30%.所以,护孔和堵漏方法的改进,就成为该区钻探技术上
First, the production difficulties is the subject of our technical research × × × × × × ore mining area in Liaoning Province, is located in the edge of the southern tip of the Prince Edward River depression, deep weathered zone with obvious wrinkles, fracture development, the crustal crust is the main ore-bearing structure The formation lithology is loose, broken, soft and hard frequency change, fissure interspersed.Most of drilling holes appear flushing fluid loss and pore wall collapse over diameter, etc .. Some bore holes, often water, sand, shrinkage and other accidents occur If improper measures are taken, it often leads to serious borehole accidents or casing accidents, and the average pure drilling rate has not exceeded 30% over the three years of drilling, so improvement in the method of hole protection and plugging has become the area of drilling technology