| Specification | Outer Diameter | Inner Diameter | Length | Thread Standard | Material | Heat Treatment Method |
| BQ | Φ55.6 | Φ46 | 3m/2m/1.5m | International | XJY850 | Overall heat treatment |
| NQ | Φ70.15 | Φ60 | 3m/2m/1.5m | International | XJY850 | Overall heat treatment |
| HQ | Φ89 | Φ77.8 | 3m/2m/1.5m | International | XJY850 | Overall heat treatment |
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Email：sales@hhdrillrig.com
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Postcode: 222062
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