Core barrel drill rod

Core Barrel Core Tube Drilling Rod For Core Drilling API ISO 1.Description of Products Core barrel or core tube -In core drilling, a section of pipe attached to the top of the bit to hold and protect the core.When drilling, it also ACTS as a guide drill tool. An ordinary core tube is just a seamless steel tube with a wire at both ends, with a diameter slightly smaller than that of the drill bit (2~4 mm).The length of a single core pipe is 3~ 45 meters. In order to prevent the bending of drilling hole, several core pipes can be connected to form a long and thick diameter drilling tool.Special core pipes, such as double core pipes, are often used for drilling in special formations (such as loose and broken formations). 2.Specifications of Core Barrel Standard Size O.D×W ID Material Remark GB/T16950-1997 73 Φ73x4.5 Φ64 DZ40 Length and thread depends on customers demands. 89 Φ89x4.5 Φ80 DZ40 108 Φ108x4.5 Φ99 DZ40 127 Φ127x4.5 Φ116 DZ40 146 Φ146x5 Φ136 DZ40 168 Φ168x6.5 Φ155 DZ40 DCDMA AW Φ57.4x4.40 Φ48.6 R780 BW Φ73.2x6.35 Φ60.5 R780 NW Φ89.1x6.35 Φ76.4 R780 HW Φ114.3x6.35 Φ101.6 R780 PW Φ139.7x7.10 Φ125.5 R780 SW Φ168.3x6.15 Φ155.7 R780 3. Features of Core Barrel The single-acting double-layer core barrel drilling tool has simple structure, easy operation, good coaxiality and long service life, which can effectively improve the adoption rate of rock and ore core and ensure the integrity of rock and ore core. 4.Drill Tube Using Notes a.New drill tube should be pasted thread oil before connection b.Make up and break at least 3 times before drilling c.Hard bending and plastic coating can be processed according to costumer special requirement.