The primary working principle of the air lift reverse circulation drilling rig relies on the isothermal expansion of compressed air within the liquid, which is then utilized to lift the liquid, facilitating reverse circulation drilling. To elaborate, compressed air is conveyed through a double-walled drill pipe to a designated depth within the well, where it combines with the liquid inside the drill pipe, creating a gas-liquid mixture with a density less than that of the flushing liquid. Under the influence of the water column pressure within the annular gap outside the drill pipe, this mixture ascends at a rapid pace, continuously expelling rock debris from the hole's base to the surface.
The air lift reverse circulation drilling rig offers distinct advantages in construction. Firstly, its strong rock debris removal capability minimizes blockages, reduces equipment wear, prolongs drill bit lifespan, enhances drilling efficiency, and ensures high borehole quality. When operating in loose formations, it reduces the likelihood of hole wall collapses. Additionally, this drilling method is adaptable to various formations, particularly excelling in large diameter boreholes. It effectively removes rock debris from the hole's bottom, facilitating smooth drilling progress.
| Technical Parameter |
| Drilling capacity |
Drilling depth(m) |
500 |
| The hole diameter(mm) |
140-400 |
| Drill pipe diameter(mm) |
76/89/102/114 |
| Drill pipe length(m) |
1.5/2/3/6 |
| Drive head |
Rotation torque(N.m) |
8000-12000 |
| Rotation speed(rpm) |
40-160 |
| Stroke(m) |
3.3/6.6 |
| Rig lifting force(kN) |
300 |
| Feeding capacity(kN) |
150 |
| Rapid rise speed(m/min) |
20 |
| Fast feeding speed(m/min) |
40 |
| Power Unit |
Engine brand |
C UMMINS |
| Rated power/speed(kW/rpm) |
132/2400 |
Tool winch capacity |
Lifting force(kN) |
20 |
| Air compressor |
Air pressure(MPA) |
1.7-3.5 |
| Air consumption(m³/min) |
17-42 |
| Equipped with hammer(Reverse circulation) |
Medium and high pressure series |
| Crawler chassis |
Walking speed(km/h) |
2.5 |
| Climbing angle(°) |
30 |
| Dimension |
Transport(mm) |
6300*2100*2500 |
| Working(mm) |
4000*2900*6800 |
| Weight(t) |
12 |
1. Are you a trading company or a manufacturer?
We are a professional manufacturer. Our factory mainly produces water well drilling rigs, core drilling rigs, down-the-hole drilling rigs, pile drivers, etc. The products have been exported to hundreds of countries around the world and enjoy a high reputation all over the world.
2.How to inspect the goods?
1) Support customers to come to the factory for on-site inspection.
2) Support customers to designate third-party companies to inspect goods.
3) Support video inspection.
3.How long is your delivery cycle?
1) In the case of stock, we can deliver the machine within 7 days.
2) Under standard production, we can deliver the machine within 15-20 days.
3) In the case of customization, we can deliver the machine within 25-30 days.
4. What's your terms of payment?
T/T 30% as deposit, and 70% before delivery. We'll show you the photos of the products and packages before you pay the balance.
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