... /8"-6 5/8" 2.Grade:E,X,G,S 3.Upset: ... 150XT,300XT, Botn1000,3000 5.IPC:TC2000,TK34 Horizonal Directional Drill pipes drill tools For more than 40 years, ... 've been exploring and developing upon producing various oil drilling tools including Drill Pipe, Drill Collar, Heavy Weight ... improve the galling-resistance during initial break-in and drilling operation, all threads are also phosphated or coppered, ...