The Non magnetic Heavy Weight Drill Pipe are made from low carbon stainless steel.acc to API Spec.7 and SY/T5144.All threads are phosphated, copperized or cold worked.All connections are equipped with pressed steel thread protectors. All threads are machined with CNC Lathes-Double-shouldered and special threads.
Non magnetic Heavy Weight Drill Pipe specification
Size | OD | ID | Connection | Body | ||||||
mm | in | mm | in | Style | OD | Bevel diameter Pin and box mm 195.70 170.7 | Upset | |||
mm | in | Center area mm | End area mm | |||||||
WJZ66-6 5/8 FH-I | 168.3 | 6 5/8 | 114.3 | 4 1/2 | 6 5/8FH | 209.6 | 8 1/4 | 195.0 | 184.2 | 176.21 |
WJZ55-5 1/2FH-I | 139.7 | 5 1/2 | 92.1 | 3 5/8 | 5 1/2FH | 177.8 | 7 | 170.7 | 152.4 | 144.5 |
WJZ50-NC50-I | 127.0 | 5 | 76.2 | 3 | NC50 | 168.3 | 6 5/8 | 154.0 | 139.7 | 130.2 |
WJZ45-NC46-I | 114.3 | 4 1/2 | 71.4 | 2 13/16 | NC46 | 158.8 | 6 1/4 | 145.3 | 127.0 | 117.5 |
WJZ35-NC38-I | 88.9 | 3 1/2 | 52.39 | 2 1/16 | NC38 | 120.7 | 4 3/4 | 116.3 | 101.6 | 92.1 |
WJZ29-NC31-I | 73.03 | 2 7/8 | 50.8 | 2 | NC31 | 104. 8 | 4 1/8 | 100.4 | 84.1 | 81.0 |
Non magnetic Heavy Weight Drill Pipe of Mechanical properties referring to those o non magnetic drill collar
Magnetic properties
MPS=1*105/4
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