Non-magnetic drill collar drill pipes meet SY/T5144 standard, the thread can be cold rolled, and double-shoulder threads and other special threads can also be processed according to specifications.
Outer Diameter Limit | Yield point | Tensile strength | Elongation Factor | |
| mm | in | Rp0.2 Mpa | Rm Mpa | A% |
| 88.9-174.6 | 3 1/8-6 3/4 | ≥758 | ≥827 | ≥18 |
| 177.8-279.4 | 7-11 | ≥689 | ≥758 | ≥20 |
Magnetic field = (1X10 5 /4π) A/m
Relative Magnetic Permeability μr<1.010
Magnetic Field Gradient: △B≤0.05μT
Non-magnetic drill collar pipe is a high-performance drill bit component made of low-carbon high-chromium-manganese alloy steel. It has excellent low magnetic permeability performance, ensuring that the accuracy of magnetic measuring instruments is not compromised in the magnetic field environment, and is an indispensable equipment in directional drilling. Non-magnetic drill collar pipes not only have high strength, but also exhibit excellent corrosion crack resistance and wear resistance, and can maintain excellent stability and durability in harsh drilling conditions.
