Application: using for oil drilling. Drill pipe Specifications: ø40,50, 60,73,89,114,127,139Drill pipe material: DZ50, R780, G105, S135 Joint material: 40Cr, 45Mn2, 35CrMo,42 CrMo, 4137HSizeWeightFalt-end weightGradeWall thicknessUpset typesInchmmLb/ftKg/mInchmm2 3/860.36.656.269.32E.X.G.S0.2807.11EU2 7/873.010.409.7214.48E.X.G.S0.3629.19IU,EU3 1/288.99.508.8113.12E0.2546.45IU,EU3 1/288.913.3012. ...