down the hole drilling

Down-the-Hole (DTH) Drilling Rigs: Precision, Power & Reliability for Commercial Water Well Projects

Struggling with Slow Penetration Rates or Premature Bit Wear?

Commercial drilling projects demand efficiency, durability, and cost control. Downtime from equipment failure or slow progress can derail timelines and budgets. Our Down-the-Hole (DTH) drilling rigs are engineered to tackle the toughest formations—granite, basalt, or hard rock—with unmatched speed and longevity, ensuring your projects stay on schedule and profitable.

What Is Down-the-Hole Drilling & How Does It Work?

DTH drilling is a rotary percussive method where a hammer strikes the drill bit directly at the bottom of the hole, delivering maximum energy transfer for faster penetration. The workflow:

Compressed air powers the hammer, driving the bit into rock.
Cuttings are flushed upward via air circulation, maintaining hole cleanliness.
Continuous rotation ensures even wear and precise borehole alignment.

Ideal for depths of 50–500 meters and diameters of 4–12 inches, DTH outperforms conventional rotary drilling in hard rock by 30–50%.

Why Choose Our DTH Rigs? Key Innovations

Feature	Benefit
High-Pressure Hammer Design	25% greater impact energy vs. competitors for faster drilling
Carbide-Enhanced Button Bits	2x lifespan in abrasive formations
Modular Compressor System	Adjustable CFM for varying rock hardness
Automated Rod Handling	Reduces manual labor and tripping time by 40%
Real-Time Depth/Pressure Monitoring	Prevents blowouts and optimizes performance

DTH vs. Alternatives: How Does It Compare?

Metric	DTH Drilling	Rotary Drilling	Top-Hammer Drilling
Penetration Rate (Hard Rock)	8–15 m/hr	2–5 m/hr	4–8 m/hr
Bit Life (Granite)	300–500 hrs	100–200 hrs	150–300 hrs
Fuel Efficiency	High (Air-driven)	Moderate	Low (Hydraulic)
Borehole Accuracy	±1° deviation	±3° deviation	±2° deviation

Our rigs dominate in hard-rock applications, reducing operational costs per meter.

Technical Specifications: Built for Heavy-Duty Performance

Power Range: 500–1,200 CFM compressor capacity
Drill Pipe Diameter: 3.5"–6.5" (API-threaded)
Max Torque: 8,000 Nm for stubborn formations
Materials: Swedish steel hammer casings, tungsten-carbide buttons
Depth Capacity: Up to 500m (1,640 ft)

Who Uses Our DTH Rigs? Proven Applications

Municipal Water Supply: Rapid well installation in urban/peri-urban areas (e.g., drilled 120 wells in Arizona’s volcanic strata).
Mining Dewatering: High-volume production wells drilled at 12 m/hr in Canadian Shield bedrock.
Agricultural Irrigation: Cost-effective boreholes for rural communities in East Africa (avg. depth: 200m).

Investment & Financing Options

Purchase Price: $150,000–$450,000 (scalable configurations)
Leasing: $3,200/month (36-month term)
Pay-per-Meter Contracts: Ideal for short-term projects

ROI Example: A Texas contractor reduced drilling costs from $85/m to $52/m by switching to our DTR450 model.

FAQs: Expert Answers to Common Queries

Q: How often do bits need replacement?
A: With proper flushing, our carbide bits last 250–400 hours in granite (vs. industry avg. of 150 hrs).

Q: Can DTH handle waterlogged formations?
A: Yes—our sealed hammer design prevents fluid ingress during wet drilling.

Q: What’s the lead time for rig delivery?
A: Standard units ship in 4–6 weeks; expedited options available.

Upgrade Your Fleet with Industry-Leading DTH Technology

Engineered for contractors who refuse to compromise on productivity or equipment longevity, our DTH rigs deliver measurable ROI—bore after bore. Request a customized performance analysis today.

Inquiry

Drop Your Request, Get Detailed Price

Need Latest Crane Price? Please leave us the required Crane's Capacity, Lifting Height, Span, Travelling Length & Voltage for Quick Quotation.