1.Brief introduction of QZ-2A three phase electric sampling drilling rig QZ-2A is a three phase electric sampling drilling rig , produced by Shandong Master Machinery Group Co.,Ltd. It is suitable for industrial and civil buildings, bridges, railways, roads, utilities and other sectors of the geological exploration. 2. Technical parameters of QZ-2A three phase electric sampling drilling rig QZ-2A three phase electric sampling drilling rig Borehole diameter (mm) 32-91 Drilling depthï¼?mï¼? soilÏ??10-15m stoneÏ??5-10m stoneÏ?75ï¼?10-15m stoneÏ?60ï¼?15-20m stoneÏ?46ï¼?20-25m Drilling pipe diameter (mm) 28 Rotate speedï¼?r/minï¼? 185-380 Torqueï¼?n.mï¼? 80 Powerï¼?kwï¼? 3 Dimensionï¼?l*w*hï¼? 600*450*1900 Weightï¼?kgï¼? 95 3. Configuration list of QZ-2A three phase electric sampling drilling rig Item Parameter Unit Quantity Three phase electric sampling drilling rig QZ-2A platform 1 Drilling pipe 28*1500 pc 6 Drilling pipe 28*800 pc 8 Drilling joint 35 pc 14 Reducing nipple 45/35 pc 1 Core barrel 45*800 pc 1 Alloy bit 46 pc 1 Reducing nipple 58/35 pc 1 Core barrel 58*800 pc 1 Alloy bit 60 pc 1 Three-wing bit 0 pc 1 Safety clamp hold 1 Water seal Y30*50*10 pc 4 Oil seal 17*50*10 pc 2 Control wheel set 1