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DTH Drill Pipe
DTH drill pipe, also known as percussion drill rods or down the hole rods, is the critical connection between your rig's power head and the DTH hammer on bottom. These high-pressure rods transmit torque, hammer impacts, and drilling fluid while maintaining structural integrity under extreme cyclic loading. MSD offers a comprehensive range of drill pipe diameters from 44mm (AWJ series) to 140mm, with lengths from 1000mm to 6000mm, designed to match your rig specifications and drilling requirements. All pipes feature premium nitrated threads and friction-welded construction for maximum durability and reliability in high-pressure applications.
| Description | Thread Type | Weight (kg) | O.D. (mm) | I.D. (mm) | Wall Thickness (mm) |
|---|---|---|---|---|---|
| AWJ HD × 1500 mm | AWJ | 8.0 | 44.4 | 16.0 | 6.3 |
| AWJ HD × 2000 mm | AWJ | 11.0 | 44.4 | 16.0 | 6.3 |
| AWJ HD × 3000 mm | AWJ | 15.0 | 44.4 | 16.0 | 6.3 |
| Description | Thread Type | Weight (kg) | O.D. (mm) | I.D. (mm) | Wall Thickness (mm) |
|---|---|---|---|---|---|
| BWJ HD × 1500 mm | BWJ | 10.0 | 54.0 | 19.0 | 6.3 |
| BWJ HD × 2000 mm | BWJ | 13.0 | 54.0 | 19.0 | 6.3 |
| BWJ HD × 3000 mm | BWJ | 19.0 | 54.0 | 19.0 | 6.3 |
| Description | Thread Type | Weight (kg) | O.D. (mm) | I.D. (mm) | Wall Thickness (mm) |
|---|---|---|---|---|---|
| 70 × 1000 mm | RD 50-6 | 12.0 | 69.9 | 25.0 | 4.0 |
| 70 × 1500 mm | RD 50-6 | 16.0 | 69.9 | 25.0 | 4.0 |
| 70 × 2000 mm | RD 50-6 | 20.0 | 69.9 | 25.0 | 4.0 |
| 70 × 3000 mm | RD 50-6 | 27.0 | 69.9 | 25.0 | 4.0 |
| Description | Thread Type | Weight (kg) | O.D. (mm) | I.D. (mm) | Wall Thickness (mm) |
|---|---|---|---|---|---|
| 76 × 1000 mm | API 2"3/8 Reg | 11.0 | 76.0 | 30.0 | 4.0 |
| 76 × 1500 mm | API 2"3/8 Reg | 15.0 | 76.0 | 30.0 | 4.0 |
| 76 × 2000 mm | API 2"3/8 Reg | 18.0 | 76.0 | 30.0 | 4.0 |
| 76 × 3000 mm | API 2"3/8 Reg | 25.0 | 76.0 | 30.0 | 4.0 |
| Description | Thread Type | Weight (kg) | O.D. (mm) | I.D. (mm) | Wall Thickness (mm) |
|---|---|---|---|---|---|
| 76 HD × 1000 mm | API 2"3/8 Reg | 15.0 | 76.0 | 30.0 | 6.35 |
| 76 HD × 1500 mm | API 2"3/8 Reg | 20.0 | 76.0 | 30.0 | 6.35 |
| 76 HD × 2000 mm | API 2"3/8 Reg | 26.0 | 76.0 | 30.0 | 6.35 |
| 76 HD × 3000 mm | API 2"3/8 Reg | 36.0 | 76.0 | 30.0 | 6.35 |
| Description | Thread Type | Weight (kg) | O.D. (mm) | I.D. (mm) | Wall Thickness (mm) |
|---|---|---|---|---|---|
| 89 × 1500 mm | API 2"3/8 Reg | 19.0 | 89.1 | 25.0 | 4.0 |
| 89 × 2000 mm | API 2"3/8 Reg | 25.0 | 89.1 | 25.0 | 4.0 |
| 89 × 3000 mm | API 2"3/8 Reg | 31.0 | 89.1 | 25.0 | 4.0 |
| Description | Thread Type | Weight (kg) | O.D. (mm) | I.D. (mm) | Wall Thickness (mm) |
|---|---|---|---|---|---|
| 89 HD × 1000 mm | API 2"3/8 Reg | 18.0 | 89.1 | 25.0 | 6.35 |
| 89 HD × 1500 mm | API 2"3/8 Reg | 25.0 | 89.1 | 25.0 | 6.35 |
| 89 HD × 2000 mm | API 2"3/8 Reg | 31.0 | 89.1 | 25.0 | 6.35 |
| 89 HD × 3000 mm | API 2"3/8 Reg | 44.0 | 89.1 | 25.0 | 6.35 |
| Description | Thread Type | Weight (kg) | O.D. (mm) | I.D. (mm) | Wall Thickness (mm) |
|---|---|---|---|---|---|
| 114 × 1500 mm | API 3"1/2 Reg | 36.0 | 114.3 | 42.0 | 6.35 |
| 114 × 2000 mm | API 3"1/2 Reg | 45.0 | 114.3 | 42.0 | 6.35 |
| 114 × 3000 mm | API 3"1/2 Reg | 61.0 | 114.3 | 42.0 | 6.35 |
| 114 × 4500 mm | API 3"1/2 Reg | 87.0 | 114.3 | 42.0 | 6.35 |
| 114 × 6000 mm | API 3"1/2 Reg | 111.0 | 114.3 | 42.0 | 6.35 |
| Description | Thread Type | Weight (kg) | O.D. (mm) | I.D. (mm) | Wall Thickness (mm) |
|---|---|---|---|---|---|
| 140 × 1500 mm | API 4"1/2 Reg | 52.0 | 139.7 | 57.0 | 6.35 |
| 140 × 2000 mm | API 4"1/2 Reg | 62.0 | 139.7 | 57.0 | 6.35 |
| 140 × 3000 mm | API 4"1/2 Reg | 83.0 | 139.7 | 57.0 | 6.35 |
| 140 × 4500 mm | API 4"1/2 Reg | 117.0 | 139.7 | 57.0 | 6.35 |
| 140 × 6000 mm | API 4"1/2 Reg | 146.0 | 139.7 | 57.0 | 6.35 |
Our engineering philosophy is straightforward: transmit maximum power with zero failure. Every component of an MSD DTH drill pipe is optimized for strength, fatigue resistance, and predictable performance under extreme cyclic loading.
Precision friction-welded joints deliver joint strength exceeding the parent tube. Monolithic connection eliminates weak points and ensures reliable power transmission with zero coupling failures.
Hardened nitrogen case treatment on all thread surfaces. Resists galling, stripping, and premature wear. Ensures smooth connections that can be quickly made up and broken out without damage.
Comprehensive sizing from 44mm (compact rigs) to 140mm (large-scale production). Standard and Heavy Duty (HD) variants available to match your rig's load capacity and drilling power.
Premium alloy steel selected for both tensile strength and shock absorption. Each pipe batch tested to verify yield strength and fatigue resistance under percussion drilling stress.
Tight tolerances on internal diameter ensure consistent drilling fluid flow and efficient flushing. Reduces material buildup and maintains drilling efficiency throughout the rod's service life.
Available in all major thread standards (AWJ, BWJ, RD 50-6, API 2"3/8 Reg, API 3"1/2 Reg, API 4"1/2 Reg). Direct compatibility with existing rig equipment—no adapters required.
The joint is the most critical point in any drill rod string. MSD DTH drill pipes feature precision friction-welded joints where the tube ends are heated through rotational friction and forge-bonded together. This process creates a homogeneous grain structure at the joint that often exceeds the tensile strength of the parent tube. The result: zero coupling failures, predictable performance, and maximum uptime. Unlike threaded couplings that depend on fastener tension and can loosen under vibration, friction-welded joints are mechanically inseparable and maintain their strength for the life of the rod.
Thread galling and stripping are expensive field problems. All MSD DTH pipe threads undergo hardened nitrogen case treatment, which creates a corrosion-resistant, wear-resistant surface layer while maintaining a tough, shock-absorbing core. This controlled hardness profile eliminates galling during makeup and ensures the threads can be broken out and reconnected repeatedly without degradation. Operators enjoy smooth, predictable thread engagement every connection—critical for on-site efficiency and safety.
From compact water well rigs to large-scale mining operations, MSD offers DTH drill pipes ranging from 44mm (AWJ/BWJ series) up to 140mm (API 4"1/2 Reg). Each size is available in standard and Heavy Duty (HD) variants, allowing you to match the rod's load capacity and stress rating to your specific rig's power head torque and impact energy. This flexibility ensures optimal performance—you're never over-speccing or under-speccing your string.
DTH drilling is unique in its demand for materials that absorb impact shock while maintaining structural integrity. MSD selects premium alloy steels specifically graded for percussion drilling environments. Each production batch undergoes rigorous testing to verify yield strength, ultimate tensile strength, and fatigue resistance under cyclic hammer impact. This material discipline translates to longer rod life and fewer string failures in the field—reducing costly downtime and rig moves.
Drilling fluid flow efficiency directly impacts hole cleaning and drilling speed. MSD maintains tight internal diameter tolerances across the entire bore length, ensuring consistent fluid velocity and preventing material buildup that could cause blockages. Precision bore control also minimizes internal corrosion sites and keeps drilling fluid characteristics stable. The result is sustained drilling efficiency throughout the rod's service life—no degradation as bore wears.
Your drill pipe must fit your rig. MSD DTH pipes are manufactured in all major thread standards—AWJ, BWJ, RD 50-6, API 2"3/8 Reg, API 3"1/2 Reg, and API 4"1/2 Reg. This comprehensive coverage means you can source replacement rods or build string extensions without expensive custom adapters or thread modifications. Direct compatibility also simplifies inventory management and reduces field confusion during equipment swaps or rig transitions.
Friction-Welded Joint Integrity
Thread Standards Available
Coupling Failures
APPLICATIONS
CASE STUDIES
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Read MoreA down the hole drill pipe, also known as a DTH rod, percussion drill rod, or drilling pipe, is the structural backbone connecting your rig's power head to the DTH hammer on bottom. These high-pressure rods transmit rotational torque, impact energy, and drilling fluid while withstanding extreme cyclic loading and shock stress. As a leading manufacturer in China with over two decades of expertise, MSD has perfected the design and production of these critical components. Our DTH drill pipes deliver superior strength, predictable performance, and exceptional reliability across water well drilling, mining, geothermal, foundation piling, and construction applications.
The performance of any DTH drill pipe depends on the synergy between three critical elements. Premium alloy steel is selected for both tensile strength and shock absorption capability—the material must flex under hammer impact without fracturing. Friction-welded joints are forged under precise temperature and pressure control, creating a monolithic bond where joint strength often exceeds the parent tube, eliminating the weak-point risk of threaded couplings. Nitrated thread surfaces resist galling and wear, ensuring smooth makeup and breakout without degradation. Together, these elements create a drill pipe that reliably transmits maximum power while absorbing the extreme cyclic stresses of percussion drilling, delivering years of dependable service life.
Selecting the correct drill pipe specification is essential to drilling success. Pipe diameter ranges from compact 44mm (AWJ/BWJ series for small water well rigs) to heavy-duty 140mm (API 4"1/2 Reg for large-scale mining operations). Each size is offered in Standard and Heavy Duty (HD) variants—Standard for moderate drilling loads and HD for high-power, deep-hole, or severe-condition applications. Thread standards include AWJ, BWJ, RD 50-6, API 2"3/8 Reg, API 3"1/2 Reg, and API 4"1/2 Reg, ensuring compatibility with your existing rig equipment. Proper matching of pipe diameter, load rating, and thread type to your rig's torque capacity and drilling power maximizes efficiency and minimizes fatigue failures. Available lengths span 1000mm to 6000mm, accommodating both compact drill strings and extended formations requiring deep penetration.
Beyond manufacturing, we provide complete drilling solutions. Our engineers analyze your rig specifications, project geology, and drilling objectives to recommend the ideal drill pipe diameter, load rating, thread standard, and length combination. By optimizing your entire string—from power head compatibility through hammer energy transmission to hole-bottom impact—we help you achieve the lowest possible cost per meter. With a massive inventory spanning all sizes, load ratings, and thread standards, combined with agile production capability, we ensure your project stays on schedule without delays. MSD delivers OEM-quality DTH drill pipes at competitive Chinese factory pricing, backed by technical support and proven reliability across 50+ countries. Trust MSD for drilling pipes and expert partnership that maximize your rig uptime and project profitability.
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