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· Diameter: 73–273 mm
· Wall Thickness: 4.5–25 mm
· Length: 1–12 m
· Threads: API REG / API IF / BECO
Available in multiple sizes and thread configurations to match different DTH hammers and drilling requirements.
· Diameter: 73–273 mm
· Wall Thickness: 4.5–25 mm
· Length: 1–12 m
· Threads: API REG / API IF / BECO
Available in multiple sizes and thread configurations to match different DTH hammers and drilling requirements.
General Introduction
DTH Drill Pipes are hollow steel tubes designed to connect the drilling rig with the DTH hammer and DTH bit. They transmit rotation and feed force, deliver compressed air, and extend drilling depth by connecting multiple pipes.
Applications
Widely used in mining, quarrying, water well drilling, geothermal drilling, blasting, and other rock drilling applications.
Technical Specifications
| Outer Diameter (inch) | Outer Diameter (mm) | Wall Thickness (mm) | Thread Type (Pin/Box) | Length Range (m) |
| 2 7/8' | 73 | 4.5–6.5 | API 2 3/8' REG / API 2 3/8' IF | 1–9.14 |
| 3 1/2' | 89 | 4.5–6.5 | API 2 3/8' REG / API 2 7/8' IF | 1–12 |
| 4' | 102 | 6.5–8.5 | API 3 1/2' REG / API 2 7/8' IF | 1–12 |
| 4 1/2' | 104 | 6.5–8.5 | API 3 1/2' REG / API 2 7/8' IF | 1–12 |
| 5' | 127 | 8.5–10 | API 3 1/2' REG / API 2 7/8' IF | 1–12 |
| 5 3/4' | 146 | 8.5–10 | API 4 1/2' REG / API 4' IF | 1–12 |
| 6 5/8' | 168 | 8.5–10 | API 5 1/2' REG / API 4 1/2' BECO / API 4 1/2' | 1–12 |
| 7' | 178 | 19–25 | BECO 5 1/4' / API 6 5/8' REG / API 4 1/2' IF | 6–12 |
| 7 5/8' | 194 | 19–25 | BECO 6' / API 6 5/8' REG | 6–12 |
| 8 5/8' | 219 | 19–25 | BECO 6' / API 7 5/8' REG | 6–12 |
| 10 3/4' | 273 | 19–25 | BECO 8' / API 8 5/8' REG | 6–12 |
Key Features
• Wide Compatibility
Available in various diameters, lengths, and thread configurations to match different DTH drilling systems.
• High Strength & Durability
Manufactured from high-quality alloy steel with optimized heat treatment for excellent impact resistance and long service life.
• Reliable Thread Connection
Precision-machined threads provide secure connection, efficient torque transmission, and stable drilling performance.
• Efficient Air Flushing
Hollow internal design ensures smooth compressed air delivery and effective removal of rock cuttings.
• Precision Manufacturing
High manufacturing accuracy helps improve drilling stability and maintain hole straightness.
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CORE MESSAGE
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From shallow hole to deep hole drilling systems, Qstone provides complete rock drilling solutions for global mining and construction projects.
Luoyang Qianshi Machinery Equipment Co., Ltd
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Phone：15538565281
Email：info@q-stones.com
Address：Second floor, Forbidden City, Xigong District, Luoyang City, Henan Province
Copyright © 2026 Luoyang Qianshi Machinery Equipment Co., Ltd All Rights Reserved.
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