| 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 non-magnetic drill collar for well drilling. Made by GPE Oil Machinery Co., Ltd, this API 7-1 NMDC drill collar is designed to enhance drilling efficiency. Get reliable drilling equipment from a trusted supplier.
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 meet the mechanical properties specified in ASTM A-370. With every drill collar, we provide complete mechanical and chemical mill test certifications, ensuring the highest quality standards.
Our mill test certifications guarantee a hardness range of 285 to 341 BHN and an impact value of 40 ft.-lbs. at room temperature, one inch below the surface. These certifications assure you of the exceptional durability and performance of our drill collars.
To ensure precise and accurate bores, all our drill collar bars are trepanned and drifted according to API specifications. The bar surface finish is "as rolled," maintaining the original mill finish for a superior appearance and functionality.
| 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
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