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TRD-400 Top-drive Rotary-Percussive Water-Air Dual-Use Drill Rig
- Hydraulic steel crawler chassis
- AMT semi-auto transmission
- Dual water-air drilling system
- 12,000 Nm rotary torque
Top-drive · Water & Air Dual-Use
TRD-400 Mechanical Top-drive Drill Rig
✔️ Rotary-Percussive | Mud & Pneumatic Integration
🔹 TRD-400 Overview — Engineered for both water drilling (mud circulation) and air drilling (DTH hammer), the TRD-400 solves low efficiency in clay layers with air drilling and difficult hard rock/gravel layers with mud drilling. Delivers superior penetration in any geological formation.
📐 Drilling Capacity
High-capacity drilling system adaptable to various methods: mud rotary, pneumatic DTH, wireline coring.
Hole diameter75 – 350 mm
Mud drilling depth700 m
Pneumatic drilling depth400 m
NQ wireline coring800 m
Drilling angleN/A (vertical / adjustable mast)
⚙️ Power Unit (Diesel Engine)
Reliable Yunnan Yunnei engine delivering exceptional torque and fuel efficiency for heavy drilling.
Engine modelYunnei YN48GBZ
Rated power92 kW
Rated speed2400 rpm
🔧 Power Head
Mechanical top-drive with AMT semi-auto transmission, providing wide speed range and high torque to suit both water & air drilling.
Rotary speed110 – 900 r/min
Max torque0 – 12,000 N·m
StrokeHydraulic cylinder (full stroke variable)
📈 Feed System
Powerful hydraulic feeding with precise control, lifting force for deep hole tripping.
Lifting force240 kN
Thrust force180 kN
🏗️ Winch
Mechanical single-rope winch for heavy auxiliary operations, supporting drill string handling.
Mechanical winch (single rope)7.5 Ton
🔄 Drill Rod
Standard hardened rods compatible with multiple diameters and 3m length for efficient drilling cycles.
Rod diameterφ50 / φ60 / φ76 / φ89 mm
Rod length3000 mm
🐾 Crawler Chassis
Heavy-duty hydraulic steel tracks with excellent off-road performance and gradeability.
Travel speed0 – 2 km/h
Climbing ability25° – 30°
📏 Machine Dimensions & Weight
Compact transport dimensions with stable working footprint, suitable for rugged job sites.
Transport status (L×W×H)6300 × 2000 × 2650 mm
Working status (L×W×H)3800 × 3250 × 8300 mm
Machine weight9000 kg
💨 Matching Air Compressor
Optimized air demand for DTH hammer and pneumatic drilling, efficiently removing cuttings.
Total air consumption16 – 35 m³/min
Working air pressure10.5 – 24.6 bar
✨ Key Features
Hydraulic steel crawler tracks with powerful off-road mobility
4 hydraulic square tube outriggers for auxiliary support and easy loading/unloading
Drill pipe rack and foot pedal on both sides – ergonomic design
Automatic breakout cylinder at front for easy pipe loosening
Dual hydraulic pump system with flow merging technology for fast head lifting/lowering
Direct coupling between hydraulic pump and engine for superior climbing & moving force
AMT automated manual transmission — optimal torque/speed for both water and air drilling
Electric shift control with one-touch speed, rotation direction change, and inching
⚙️ Working Principle
The TRD-400 integrates mechanical top-drive technology with dual circulation systems. For water drilling, mud pumps deliver high-viscosity fluid to stabilize boreholes and remove cuttings; for air drilling, a high-pressure air compressor supplies air flow to drive a DTH hammer, producing percussive impact for rapid penetration in hard formations. The AMT transmission seamlessly adjusts rotary speed and torque to match lithology, while the independent feed system ensures precise weight-on-bit. This dual-use capability enables operators to switch between mud rotary and air DTH without downtime, maximizing efficiency in complex strata (clay, boulders, hard rock).
❓ Frequently Asked Questions
What are the maximum drilling depths with different methods?
Based on TRD-400 specifications: mud drilling up to 700m, pneumatic (air) drilling up to 400m, and NQ wireline coring up to 800m. Depths may vary with geological conditions.
Can the rig efficiently drill in both soft overburden and hard rock?
Yes. The water-air dual-use design allows mud circulation for unconsolidated layers and DTH hammer with compressed air for fractured or hard rock. This solves typical clay layer difficulties with air drilling and low penetration in boulders with mud drilling.
What torque and speed range does the power head deliver?
The power head provides rotary speed from 110 to 900 r/min and max torque up to 12,000 N·m, ensuring high performance for both shallow large-diameter holes and deep exploration.
What air compressor is recommended for pneumatic drilling?
The matching air compressor should supply total air consumption of 16–35 m³/min with working pressure between 10.5–24.6 bar to achieve optimal DTH impact and cuttings removal.
Does the drilling rig have automatic breakout capabilities?
Yes, the TRD-400 is equipped with an auxiliary breakout cylinder at the front to easily loosen drill rod connections, greatly reducing manual labor.
What are transport dimensions and weight?
Transport dimensions: 6300×2000×2650mm, weight: 9000kg, designed for standard flatbed shipping and on-site mobility with telescopic outriggers.
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