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六十年代以来,一些单位都相继设计和制造了适合于地质岩芯钻探用的转盘钻机.目前,有的转盘钻机已成功地应用于小口径钻孔. 江西地质科研所自1975年开始研究小口径液压转盘钻机,连续做了四年多设计与试验,共试制了四轮八台样机,打了八个钻孔,累计进尺6500多米.经四轮样机的试验,说明了转盘钻机基本能满足小口径金刚石钻进工艺的要求.试验情况如下:(1)第一轮至第四轮试验最大孔深分别为760.56米,884.86米、918.98米、1201.49米,均使用φ50毫米钻杆和φ56毫米钻头.(2)
Since the 1960s, some units have successively designed and manufactured a rotary drilling rig suitable for geological core drilling. At present, some rotary drilling rigs have been successfully applied to small-bore drilling. Since 1975, Jiangxi Institute of Geology has studied small Diameter hydraulic rotary drilling rig, made more than four consecutive years of design and testing, a total trial of four rounds of eight prototypes, playing eight holes, a total footage of more than 6500 meters.Through four prototype test shows that the basic can meet the rotary drilling rig Small Diameter Diamond Drilling Requirements The test conditions are as follows: (1) The maximum hole depths from the first round to the fourth round were 760.56 meters, 884.86 meters, 918.98 meters and 1201.49 meters respectively, both using φ50 mm drill pipe and φ56 mm Drill bit. (2)