1.HW Drill Pipe by weiling 2.Internal Upset Transit area 3.Equipped with Make &Break Machine,cold rolling of the threads The ... .Hardbanding : ARNCO 100XT , 200XT, & 300XT , BOTN3000 , ARMACOR MProduct ProcessSpecial Feature Ⅰ HW Drill Pipe by welding—OD 3-1/2“to 5 ... best in the world Special Feature Ⅲ Equipped with Make & Break Machine, DP-Master can perform make & break testing as per customer ...