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岩心定向器在地质、冶金、石油、煤炭，水文等地质工程中，都有重要的使用价值。1980年，我所从瑞典阿特拉斯公司进口了一套CCO型岩心定向器。我们对引进的岩心定向器作了分析研究，结合我国钻具的实际情况，于1981年，首先设计研制了一种与φ56普通双层单动岩心管配套的YD-56型岩心定向器；经过室内试验，效果较好。随后又设计研制了一种与美国长年公司的NQ型钻具配套的YD-NQ型岩心定向器，1981年底～1982年，在江西德兴铜矿露采边坡工程的钻探工地，进行了生产试验。在3个350m的钻孔中，全孔连续采取定向岩心，
Core orientation in geology, metallurgy, petroleum, coal, hydrology and other geological engineering, have important value. In 1980, I imported a set of CCO core orientationers from Atlas, Sweden. In the light of the actual situation of drilling tools in our country, we first designed and developed a YD-56 core orientation device which is matched with φ56 common double-layer single-action core pipe. Indoor test, the effect is better. Then it designed and developed a YD-NQ core directional device matched with the NQ drilling tool of the United States for many years. From the end of 1981 to 1982, it conducted a drilling site at the Dexing copper mine outcrop slope in Jiangxi Province Production test. In the three 350m boreholes, the entire borehole continuously takes directional cores,