Customization: | Available |
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After-sales Service: | 24/7 |
Warranty: | 1 Year |
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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 ASTM A-370 mechanical properties. To ensure quality, all drill collars come with full mechanical and chemical mill test certifications.
The 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. This ensures the durability and reliability of the drill collars in various drilling operations.
For precise and accurate drilling, all drill collar bars are trepanned and drifted to API specifications, ensuring close tolerance bores. The bar surface finish is "as rolled," maintaining the original mill finish for optimal performance.
Choose GPE Oil Machinery Co., Ltd for high-quality drill collars that meet industry standards and provide exceptional performance in drilling operations.
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 |