1.HW Drill Pipe by weiling 2.Internal Upset Transit area 3.Equipped with Make &Break Machine, ... place global sale 1.OD: 2 3/8", 2 7/8", 3 1/2", 4" ,4 1/2", 5", 5 1/2" ,6 ... ARMACOR MProduct ProcessSpecial Feature Ⅰ HW Drill Pipe by welding—OD 3-1/2“to 5-1/2’ tool joints made separately sufficient ... ,NC38, NC40, NC46, NC50, 5 1/2FHOD: 3 3/8 ~ 7 1/2 inchLPC: 3~5 inchPrimary Shoulder Torque:6875~87341(ft · ...