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水力输送岩心钻进又称反循环连续取心钻进,其优点是钻进效率高、取心质量好、劳动强度小和适用范围广等。这一钻进方法在国外迅速发展,引起了我国探矿工作者的注意。1984年地矿部决定研制、试验和推广,要求勘探技术研究所、探矿工程研究所、武汉地院和野外队“通力合作”,短期内共同完成。1985年9月,双壁钻杆和特制水龙头等钻具研制出来了。同年11月到1986年7月,在江苏地质五队的固体矿床三个孔段进行了工艺可行性试验。一、工作原理水力输送岩心钻进工作原理(如图)。钻进时,冲洗液用清水或泥浆由变量泵10压
Hydraulic transport core drilling, also known as reverse circulation continuous coring drilling, has the advantages of high drilling efficiency, good coring quality, low labor intensity and wide application range. This drilling method has developed rapidly in foreign countries and attracted the attention of the prospecting workers in China. In 1984, the Ministry of Geology and Minerals decided to develop, test, and popularize, requiring the Exploration Technology Research Institute, Exploration Engineering Research Institute, Wuhan Geotechnical University, and field teams to “work together” and complete them in a short period of time. In September 1985, drilling tools such as double-walled drill pipes and special taps were developed. From November of the same year to July of 1986, process feasibility tests were carried out in the three hole sections of the solid deposit of Jiangsu Geological Group 5. First, the working principle of hydraulic conveying core drilling working principle (pictured). When drilling, the flushing fluid is pressed with fresh water or mud by the variable pump 10