DTH Drill Pipes
- Pipe diameter: 3"-7"
- Length: 1-12m
- Joint material: 42CrMo alloy steel
- Pipe body material: R780 steel
- Welding method: Friction welding
- Thread types: API-standard drill pipe threads available; custom thread designs upon request
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Typical Applications
Technical Specifications
| D | h | C | C1 | d | k | L |
| Outer diameter | Wall thickness | Thread connection | Inner bore | Wrench flat | Length | |
| 73mm(3'') | 6.5mm | API 2 3/8'' REG | 32mm | 157mm | 45mm | 1000mm-9000mm |
| 8.5mm | API 2 3/8'' REG | 32mm | 157mm | 45mm | 1000mm-9000mm | |
| 89mm(3 1/2'') | 6.5mm | API 2 3/8'' REG | 32mm | 70mm | 45mm | 1000mm-9000mm |
| 8.5mm | API 2 3/8'' REG | 32mm | 57mm | 45mm | 1000mm-9000mm | |
| 6.5mm | NC26 | 40mm | 70mm | 45mm | 1000mm-9000mm | |
| 8.5mm | NC26 | 40mm | 70mm | 45mm | 1000mm-9000mm | |
| 102mm(4'') | 6.5mm | API 3 1/2'' REG | 45mm | 83mm | 51mm | 1000mm-9000mm |
| 8.5mm | API 3 1/2'' REG | 45mm | 83mm | 51mm | 1000mm-9000mm | |
| 6.5mm | NC31 | 45mm | 83mm | 51mm | 1000mm-9000mm | |
| 8.5mm | NC31 | 45mm | 83mm | 51mm | 1000mm-9000mm | |
| 114mm(4 1/2'') | 6.5mm | API 3 1/2'' REG | 45mm | 95mm | 51mm | 1000mm-9000mm |
| 8.5mm | API 3 1/2'' REG | 45mm | 95mm | 51mm | 1000mm-9000mm | |
| 6.5mm | NC38 | 60mm | 95mm | 51mm | 1000mm-9000mm | |
| 8.5mm | NC38 | 60mm | 95mm | 51mm | 1000mm-9000mm | |
| 127mm(5'') | 8.5mm | API 3 1/2'' REG | 45mm | 108mm | 51mm | 1000mm-9000mm |
| 8.5mm | NC38 | 60mm | 108mm | 51mm | 1000mm-9000mm | |
| 133mm(5 1/4'') | 10mm | API 3 1/2'' REG | 45mm | 114mm | 51mm | 1000mm-9000mm |
| 146mm(5 3/4'') | 10mm | API 4 1/2'' REG | 60mm | 127mm | 55mm | 1000mm-9000mm |
| 168mm(6 5/8'') | 10mm | NC50 | 60mm | 149mm | 55mm | 1000mm-9000mm |
| 178mm(7'') | 10mm | API 4 1/2'' REG | 60mm | 159mm | 55mm | 1000mm-9000mm |
Performance and Configuration
- Pipe body: The pipe body is manufactured from high-quality R780 seamless steel, designed for drilling operations in complex and demanding geological conditions. It provides a balanced combination of strength, fatigue resistance, and stability during drilling.
- Tool joints: The tool joints are made from 42CrMo high-strength alloy steel, offering excellent strength, toughness, and hardenability. This material is widely used in demanding applications such as drilling tool joints, fishing tools, and heavy-duty forming dies, and is suitable for deep drilling applications up to 2000m.