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MININGWELL down-the-hole drilling equipment: efficient drilling solutions for hard rock scenarios

In engineering fields such as hydrological well drilling, coreless geological exploration, geological disaster prevention, and mining rock drilling, traditional drilling equipment often faces challenges such as low efficiency and high wear and tear in medium-hard and high-hard rock formations with poor drillability. MININGWELL, a brand specializing in the research and development of drilling equipment, has introduced a down-the-hole drilling system (including down-the-hole impactors and supporting drilling tools). With its targeted structural design and powerful rock-breaking capabilities, it has become a core equipment for conquering complex hard rock formations, providing stable and efficient drilling support for projects in various fields.

High pressure down-the-hole hammer DTH drilling hammer

Content

I. Core Product: DHD 3.5-inch Down-the-Hole (DTH) Hammer – The “Core Power” for Hard Rock Breaking

The core component of MININGWELL’s down-the-hole drilling system – the DHD 3.5-inch Down-the-Hole (DTH) Hammer – is a key piece of equipment specifically designed to tackle tough rock formations. It adopts a combined working mode of “downhole impact + rotational cutting”, which differs from traditional surface impact drilling. The impact energy acts directly on the bottom-hole drill bit, reducing energy loss during transmission through drill pipes and significantly improving hard rock breaking efficiency.

1. Performance Advantages: Adaptable to High-Hardness Rock Formations, Balancing Efficiency and Durability

Strong Impact & Low Loss: The hammer is equipped with a high-precision air distribution structure. Compressed air drives the piston to deliver high-frequency impacts (impact frequency up to 1200-1500 times per minute), with stable output of impact energy. It can effectively break high-hardness rocks (such as granite and basalt) with uniaxial compressive strength exceeding 150MPa. Meanwhile, the impact components are made of high-strength alloy steel and undergo integral heat treatment, achieving a surface hardness of HRC 58-62. This ensures excellent wear resistance and fatigue resistance, with a single-operation service life 1.2-1.5 times that of ordinary DTH hammers.
Adaptable to Multiple Lithological Scenarios: Whether dealing with gravel layers common in hydrogeological water well drilling, crystalline rock layers in geological exploration, or dense ore layers in mine rock drilling, the DHD 3.5-inch DTH Hammer can adjust impact frequency and rotational speed to match the drilling requirements of rock formations with different hardness. This avoids inefficiency or equipment overload caused by a “one-size-fits-all” approach.
Efficient Cuttings Removal Design: The DTH hammer and its matching drill bit feature a through-airway design. While compressed air drives the impact, it can quickly discharge bottom-hole cuttings through the gap between the drill pipe and the hole wall, preventing “pipe sticking” caused by cuttings accumulation. This design is particularly suitable for deep well drilling or drilling in high-viscosity rock formations, ensuring continuous operation.

2. Matching Drilling Tools: One-Stop Solution to Enhance Overall Adaptability

To maximize the performance of the DTH hammer, MININGWELL provides a complete DHD 3.5-inch down-the-hole drilling kit. Currently, a limited-time discounted package is also available: including 1 unit of 3.5-inch DTH hammer, 1 unit of 4-inch symmetric drill bit (Bit), and 4 units of 4-inch drill bit crowns (Corona). The total price of the package is only 1,680,000 currency units (please consult the brand for the specific currency type), reducing procurement costs for small and medium-sized engineering teams.

Among them, the matching drill bit adopts a tungsten carbide button inlay design, and the button arrangement follows the principle of “symmetrical force bearing”. This ensures uniform force distribution during rotational cutting, reducing eccentric wear of the drill bit. The drill bit crowns, as spare 易损件 (wear parts), are made of wear-resistant alloy materials and can be quickly replaced, avoiding downtime caused by drill bit wear and further improving operation efficiency.

II. Application Fields: Covering Multiple Engineering Scenarios, Solving Hard Rock Drilling Pain Points

With its strong adaptability to hard rock formations, MININGWELL’s down-the-hole drilling system has been widely used in four core engineering fields, specifically addressing drilling challenges in different scenarios:

1. Hydrogeological Water Well Drilling: Efficiently Tapping Underground Water Sources

In arid areas or regions with developed rock fractures, hydrogeological water well drilling needs to penetrate deep hard rock formations to reach aquifers. The high-frequency impact of the DTH hammer can quickly break rock fractures; when combined with large-diameter drill bits (such as the 4-inch matching drill bit), it can efficiently drill water well holes with a diameter of 100-200mm. Compared with traditional rotational drilling, the well completion efficiency is increased by 30%-50%, and the hole wall is smooth and less prone to collapse, ensuring the water yield and service life of the well.

2. Coreless Geological Exploration: Rapid Acquisition of Stratigraphic Data

In coreless drilling scenarios such as regional geological surveys and mineral resource general surveys, it is necessary to quickly penetrate multiple hard rock formations to obtain data on stratum lithology and thickness. The down-the-hole drilling system does not require core extraction; instead, it synchronizes impact breaking and cuttings removal, achieving an average daily footage of 15-25 meters (adjusted based on rock hardness), significantly shortening the exploration cycle. At the same time, the cuttings samples collected during drilling are highly intact, providing accurate basis for geological analysis.

3. Geological Disaster Prevention and Control Projects: Building a Solid Safety Line

In the treatment of geological disasters such as landslides and collapses, it is often necessary to drill into hard rock formations to set reinforcement structures such as anti-slide pile holes and anchor cable holes. The DTH hammer can accurately control the drilling perpendicularity (deviation ≤ 0.5°/100 meters) in fractured hard rock, ensuring the correct installation of reinforcement components. Additionally, the compact size of the equipment allows it to be adapted to small crawler drills, enabling flexible deployment in narrow operating spaces in mountainous areas and meeting the timeliness requirements of emergency disaster prevention and control.

4. Mine Rock Drilling: Supporting Efficient Mining

In open-pit mining or underground tunneling of metal mines and non-metallic mines, the down-the-hole drilling system is used to drill blasting holes (usually with a diameter of 80-150mm). Its strong rock-breaking capability can quickly penetrate the ore-rock interface; the spacing and depth of blasting holes are precisely controlled, which can improve blasting efficiency and reduce ore waste. Meanwhile, the DTH hammer’s resistance to dust and vibration makes it suitable for harsh mining operating environments, reducing equipment failure rates.

III. Product Advantages: Comprehensive Guarantee of Operation Efficiency from Design to Application

1. High Energy Utilization Rate, Reducing Engineering Costs

Compared with the traditional “surface impact – drill pipe transmission” mode, the DTH hammer works directly at the bottom of the hole, reducing the energy loss rate to less than 15% (the loss rate of the traditional mode often reaches 30%-40%). This not only reduces compressed air consumption but also minimizes wear on drill pipes caused by high-frequency vibration, extending the replacement cycle of drilling tools and indirectly saving 10%-15% of consumable costs for projects.

2. Convenient Maintenance, Reducing Downtime

The DHD 3.5-inch DTH hammer adopts a modular structure design. Core components (such as pistons and air distribution valves) can be quickly disassembled and replaced, and daily maintenance can be completed without professional equipment. The brand also provides detailed maintenance manuals and lists of wear parts, allowing customers to reserve spare parts in advance. This avoids long-term downtime caused by component damage and ensures project progress.

3. Strong Adaptability, Compatible with Mainstream Drills

The interface design of the DTH hammer complies with industry general standards and is compatible with most small and medium-sized crawler drills and hydraulic drills on the market. It can be adapted for use without large-scale modifications to existing equipment, reducing the cost of equipment upgrades for customers. This is particularly suitable for engineering teams that already own drills and want to expand their hard rock drilling business.

Whether dealing with deep hard rock in hydrogeological water wells, complex formations in geological exploration, or high-strength ore rocks in mining operations, MININGWELL’s down-the-hole drilling system can serve as a reliable choice for engineering teams to overcome hard rock challenges, with its core advantages of “efficient rock breaking, stable durability, and wide scenario adaptability”. The currently available discounted package further lowers the procurement threshold, providing a solution that balances efficiency and economy for various hard rock drilling projects.

Inquiry

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D Miningwell was founded in Quzhou city, China in 2001. For more than 20 years production and operation process. D Miningwell has been on the leading edge of mining equipment. We has its own drilling rig, DTH hammer, and drill pipe production workshops. provides a wide range of quality tools to mining, tunnelling, quarrying, water-well projects and urban transportation construction. D Miningwell is committed to providing customers with the most efficient and cost-effective drilling solution. Our team of drilling specialists are standing by to assist.

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