The Non-magnetic compressive drill pipes are made of low carbon stainless steel according to API Spec.7 and SY/T5144 . All threads are phosphated , copperized or coldworked. All Connections are equipped with pressed steel thread protectors. All threads are machined with CNC Lathes-Double-shouldered and special threads.
OD | ID | Connection | Body | ||||||
Style | OD | Inner&outer thread shoulder chamfer | upset | ||||||
mm | in | mm | in | mm | in | Center area | End area | ||
168.3 | 6 5/8 | 114.3 | 4 1/2 | 6 5/8 FH | 209.6 | 8 1/4 | 195.7 | 184.2 | 176.21 |
139.7 | 5 1/2 | 92.1 | 3 5/8 | 5 1/2 FH | 177.8 | 7 | 152.4 | 152.4 | 144.5 |
127 | 5 | 76.2 | 3 | NC 50 | 168.3 | 6 5/8 | 139.7 | 139.7 | 130.2 |
114.3 | 4 1/2 | 71.4 | 2 13/16 | NC 46 | 158.8 | 6 1/4 | 127 | 127 | 117.5 |
88.9 | 3 1/2 | 52.39 | 2 1/16 | NC 38 | 120.7 | 4 3/4 | 101.6 | 101.6 | 92.1 |
73.03 | 2 7/8 | 50.8 | 2 | NC 31 | 104.8 | 4 1/8 | 100.4 | 84.1 | 81 |
