The drill stem / drill string including DP (drill pipe), HWDP (heavy weight drill pipe), DC (drill collar), Kelly etc. The accessories, such as tool joint, drilling tool lifting sub, cross-over sub and so on are also available according to customers' detailed requirements. Nominal size D d Lmm DF(mm) Bending Strength ratio mm In mm in NC31-41(2-7/8IF) 104.8 2004-1-8 50.8 2 9150 100.4 2.43:1 NC35-47 120.7 2004-3-4 50.8 2 9150 114.7 2.58:1 NC38-50(3-1/2IF) 127 5 57.2 2002-1-4 9150 121 2.38:1 NC44-60 152.4 6 57.2 2002-1-4 9150/9450 144.5 2.49:1 NC44-60 152.4 6 71.4 2016-2-13 9150/9450 144.5 2.84:1 NC44-62 158.8 2006-1-4 57.2 2002-1-4 9150/9450 149.2 2.91:1 NC46-62(4IF) 158.8 2006-1-4 71.4 2016-2-13 9150/9450 150 2.63:1 NC46-65(4IF) 165.1 2006-1-2 57.2 2002-1-4 9150/9450 154.8 2.76:1 NC46-65(4IF) 165.1 2006-1-2 71.4 2016-2-13 9150/9450 154.8 3.05:1 NC46-67(4IF) 171.4 2006-3-4 57.2 2002-1-4 9150/9450 159.5 3.18:1 NC50-67(4-1/2IF) 171.4 2006-3-4 71.4 2016-2-13 9150/9450 159.5 2.37:1 NC50-70(4-1/2IF) 177.8 7 57.2 2002-1-4 9150/9450 164.7 2.54:1 NC50-70(4-1/2IF) 177.8 7 71.4 2016-2-13 9150/9450 164.7 2.73:1 NC50-72(4-1/2IF) 184.2 2007-1-4 71.4 2016-2-13 9150/9450 169.5 3.12:1 NC56-77 196.8 2007-3-4 71.4 2016-2-13 9150/9450 185.3 2.70:1 NC56-80 203.2 8 71.4 2016-2-13 9150/9450 190.1 3.02:1 6-5/8REG 209.6 2008-1-4 71.4 2016-2-13 9150/9450 195.7 2.93:1 NC61-90 228.6 9 71.4 2016-2-13 9150/9450 212.7 3.17:1 7-5/8REG 241.3 2009-1-2 76.2 3 9150/9450 223.8 2.81:1 NC70-97 247.6 2009-3-4 76.2 3 9150/9450 232.6 2.57:1 NC70-100 254 10 76.2 3 9150/9450 237.3 2.81:1
