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Premium DTH Drilling Tools for Mining & Water Wells

Changsha Spark Machinery Co., Ltd. is a leading manufacturer of high-performance Down The Hole hammers, drill bits, RC systems, concentric and eccentric casing systems, and related drilling accessories. Trusted globally for durability, efficiency, and innovation.

Large Diameter Drilling Tools

About Spark Drills

A trusted name in drilling tools manufacturing with cutting-edge technology and global reach.

DTH Hammer Close-up

Changsha Spark Machinery Co., Ltd.

As a professional drilling tools manufacturer and supplier based in China, Spark Drills delivers high-quality DTH hammers, bits, RC systems, casing solutions, drill pipes, adapters, and more. Our products are engineered for performance in demanding environments across mining, quarrying, water well drilling, geothermal exploration, oil & gas, construction, tunneling, and civil engineering.

With over 300 employees and a state-of-the-art 600,000+ sqm facility in Ningxiang, Hunan, we combine automation with precision engineering. Our factory is equipped with advanced CNC lathes, high-speed milling machines, and holds 32 independent intellectual property rights—including 3 invention patents. We are ISO9001 certified, ensuring consistent quality and customer satisfaction.

  • ISO9001 Certified Quality Management
  • 32+ Intellectual Property Rights
  • 600,000+ sqm Automated Manufacturing Facility
  • Global Distribution & Support Network

Our Products

Engineered for performance, durability, and efficiency in the most challenging drilling conditions.

8-inch DTH Hammer

8″ DTH Hammer DHD380 QL80

High-impact, low-air-consumption hammer with durable special steel construction and imported piston for extended service life.

  • Compatibility: DHD380, QL80, SD8, Mission80
  • Material: High-quality special steel, surface hardened
  • Advantages: High impact frequency, fast drilling speed
Concentric Casing System

Concentric Casing System With Ring Bit

Ideal for drilling through loose, unconsolidated formations. Prevents borehole collapse and supports depths up to 100 meters.

  • Application: Overburden, foundation piling
  • Design: Efficient penetration, retrievable
  • Use Case: Water well, geothermal, mining
Eccentric Casing System

Eccentric Casing System / ODEX

Designed for unstable strata with sand, silt, or small pebbles. Ensures borehole stability and easy casing advancement.

  • Depth Range: Up to 20 meters
  • Structure: Simple, reliable, easy to operate
  • Benefit: Retrievable with long service life
Large Diameter DTH Tools

Large Diameter DTH Drilling Tools

Optimized for high-efficiency drilling in mining and quarrying with maximum impact energy transmission.

  • Advantage: Low air consumption, fast penetration
  • Design: Simple structure, easy maintenance
  • Use: Open-pit mining, large-diameter holes
Reverse Circulation Hammer

Reverse Circulation (RC) Hammer

Designed for exploration and grade control sampling with clean, uncontaminated core recovery.

  • Application: Exploration, water well, mineral sampling
  • Principle: Dual-wall drilling with inner sample tube
  • Efficiency: High recovery rate, minimal contamination
6-inch DTH Hammer

6″ DTH Hammer Valveless DHD360

Robust valveless design for reliable performance in tough conditions with reduced maintenance needs.

  • Model: DHD360 COP64 QL60
  • Brand: SPARK
  • Feature: High impact power, long service life
Drill Pipe

Drill Pipes with Standard Threads

High-strength drill pipes with common thread types for compatibility with major drilling rigs.

  • Threads: Various standard configurations
  • Material: High-tensile steel
  • Use: DTH, RC, top hammer drilling
Concentric Casing with Wings

Concentric Casing System with Wings

Enhanced stability for surface casing in piling, anchoring, and foundation drilling applications.

  • Application: Piling, anchoring, foundation
  • Design: Winged structure for better grip
  • Benefit: Prevents deviation and collapse

Why Choose Spark Drills?

We combine innovation, quality, and global support to deliver superior drilling performance.

Advanced Manufacturing

Fully automated factory with CNC machining and strict ISO9001 quality control.

Durable & Reliable

High-quality materials and heat treatment ensure long service life and reduced downtime.

Global Support

Serving customers worldwide with fast delivery and technical assistance.

Innovative Design

32+ IP rights including 3 invention patents for cutting-edge drilling solutions.

600,000+
Square Meters Facility
300+
Employees
32
IP Rights
100+
Countries Served

Frequently Asked Questions

Find answers to common questions about our products and services.

What is a DTH hammer and how does it work?
A Down-The-Hole (DTH) hammer is a pneumatic tool used in drilling that delivers high-impact blows directly at the bottom of the borehole. Compressed air drives a piston inside the hammer, which strikes the drill bit repeatedly, breaking rock efficiently while flushing cuttings to the surface.
What are the advantages of large diameter DTH drilling?
Large diameter DTH drilling offers faster penetration rates, lower air consumption, and higher impact energy compared to conventional methods. It's ideal for mining, quarrying, and water well applications where large holes are required with minimal deviation.
How does reverse circulation (RC) drilling work?
Reverse Circulation drilling uses dual-wall drill rods. Compressed air travels down the annulus between the outer and inner tubes, then reverses direction at the hammer to carry cuttings up through the inner tube. This ensures clean, uncontaminated samples ideal for mineral exploration and grade control.
What is the difference between eccentric and concentric casing systems?
Eccentric (ODEX) systems use an offset pilot bit to allow simultaneous drilling and casing advancement in unstable ground. Concentric systems use a central pilot bit with casing following directly behind. Concentric systems offer better alignment and are suitable for deeper installations up to 100 meters.
Do you offer custom drilling solutions?
Yes, Spark Drills provides customized drilling tools and systems based on specific project requirements, ground conditions, and equipment compatibility. Contact our engineering team for tailored solutions.

Contact Spark Drills

Get in touch with our sales team for product inquiries, quotes, or technical support.

For direct communication, please visit the official Spark Drills website to send an inquiry or connect with our team.

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