| After-sales Service: | 24/7 |
|---|---|
| Warranty: | 1 Year |
| Manufacturing Process: | CNC Milling |
| Surface Treatment: | Spray-Paint |
| Operation Pressure: | Atmospheric Pressure |
| Material: | Alloy |
| Customization: |
|---|
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Audited Supplier Discover our high-quality API 7-1 NMDC Non-Magnetic Drill Collar, designed for well drilling. Made by GPE Oil Machinery Co., Ltd, this drill collar is essential equipment for efficient drilling operations. Get yours now!
The drill collars offered by GPE Oil Machinery Co., Ltd are manufactured using modified AISI 4145H chromium molybdenum alloy steel. These drill collar bars undergo full-length heat treatment and water quenching to achieve the desired ASTM A-370 mechanical properties. Each drill collar is accompanied by comprehensive mechanical and chemical mill test certifications, ensuring the highest quality standards.
Our drill collars boast a hardness range of 285 to 341 BHN, guaranteeing exceptional durability and resistance to wear and tear. Additionally, they exhibit an impressive impact value of 40 ft.-lbs. at room temperature, one inch below the surface, ensuring reliable performance even in challenging drilling conditions.
To ensure precise and accurate bores, all drill collar bars are trepanned and then drifted to API specifications. The bar surface finish is "as rolled," maintaining the original mill finish for a sleek and professional appearance.
| Connections | ODmm | IDmm | Lengthmm | |
| NC23-31 | 79.4 | 31.8 | 9150 | |
| NC26-35 | 88.9 | 38.1 | 9150 | |
| NC31-41 | 104.8 | 50.8 | 9150 or 9450 | |
| NC35-47 | 120.7 | 50.8 | 915 or 9450 | |
| NC38-50 | 127 | 57.2 | 9150 or 9450 | |
| NC44-60 | 152.4 | 57.2 | 9150 or 9450 | |
| NC44-60 | 152.4 | 71.4 | 9150 or 9450 | |
| NC44-62 | 158.8 | 57.2 | 9150 or 9450 | |
| NC46-62 | 158.8 | 71.4 | 9150 or 9450 | |
| NC46-65 | 165.1 | 57.2 | 9150 or 9450 | |
| NC46-65 | 165.1 | 71.4 | 9150 or 9450 | |
| NC46-67 | 171.4 | 57.2 | 9150 or 9450 | |
| NC50-67 | 171.4 | 71.4 | 9150 or 9450 | |
| NC50-70 | 177.8 | 57.2 | 9150 or 9450 | |
| NC50-70 | 177.8 | 71.4 | 9150 or 9450 | |
| NC50-72 | 184.2 | 71.4 | 9150 or 9450 | |
| NC56-77 | 196.8 | 71.4 | 9150 or 9450 | |
| NC56-80 | 203.2 | 71.4 | 9150 or 9450 | |
| 6 5/8REG | 209.6 | 71.4 | 9150 or 9450 | |
| NC61-90 | 228.6 | 71.4 | 9150 or 9450 | |
| 7 5/8REG | 241.3 | 76.2 | 9150 or 9450 | |
| NC70-97 | 247.6 | 76.2 | 9150 or 9450 | |
| NC70-100 | 254 | 76.2 | 9150 or 9450 | |
| 8 5/8REG | 279.4 | 76.2 | 9150 or 9450 | |
Suppliers with verified business licenses
Audited Supplier 
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