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 |