Diamond grade £  º SMD Main Material £  º  ¦  µ 2* 4 diamond Diamond Concentration £  º 100% HRC £  º 15-20 ¡  ¢ 20-25 ¡  ¢ 25-30 ¡  ¢ 30-35 ¡  ¢ 35-40 ¡  ¢ 40 -45 ¡  ¢ 45-50 Cor e Barrel Designation Core Bit Core Bit....
Wuxi drilling tools Factory is a large-scale key enterprise in the industry of geological exploration field. Founded in the year of 1958, the factory originally belonged to Ministry of Geology and....
Theory Drilling depth 1000m Outer diameter 89mm Inner diameter 77.8mm Length 3m/ 10ft; 1.5m/ 5ft Raw Material steel grade 30CrMnSia/ XJY850 Standard GB/ T816-2008 Treatment Heat treatment the whole....
Basic Parameters Theory Drilling depth 1500m Outer diameter 70.5mm Inner diameter 60.5mm Length 3m/ 10ft; 1.5m/ 5ft weight for 3 meter length NQ drill pipe 24 kg/ pcs Raw Material steel grade....