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 parameters |
FSL400 |
FSL500 |
FSL600 |
FSL800 |
FSL1200 |
| Max drilling depth(M) |
400 |
500 |
600 |
800 |
1000 |
| Power(KW) |
110 |
132 |
132 |
176 |
194 |
| Drilling diameter(mm) |
105-305 |
105-325 |
105-400 |
105-500 |
105-800 |
| Air pressure(Mpa) |
1.2-3.5 |
1.2-3.5 |
1.2-3.5 |
1.2-3.5 |
1.6-8 |
| Air consumption(m3/min) |
16-55 |
16-55 |
16-55 |
16-55 |
16-96 |
| Drill pipe length(m) |
3 |
3 |
3 |
6 |
6 |
| Drill pipe diameter(mm) |
89/102 |
102/114 |
102/114 |
114/127 |
127/146 |
| Air circulation double layer drill pipe diameter(mm) |
89/102 |
102/114 |
102/114 |
114/127 |
127/146 |
| Axial pressure(T) |
6 |
7 |
7 |
11 |
13 |
| Lifting force(T) |
22 |
25 |
29 |
47 |
57 |
| Fast lifting speed(m/min) |
20 |
23 |
29 |
29 |
30 |
| Fast feeding speed(m/min) |
32 |
33 |
28 |
42 |
44 |
| Max rotary torque(Nm) |
8000/4000 |
10000/5000 |
12000/6000 |
18000/9000 |
24000/12000 |
| Max rotary speed(r/min) |
75/150 |
75/150 |
75/150 |
70/140 |
86/172 |
| Small secondary winch lifting force(T) |
1.5 |
1.5 |
2.5 |
2.5 |
2.5 |
| Jacks stroke(m) |
1.6 |
1.6 |
1.6 |
1.6 |
1.7 |
| Drilling efficiency(m/h) |
10-35 |
10-35 |
10-35 |
10-35 |
10-35 |
| Moving speed(km/h) |
2.5 |
2.5 |
3.5 |
5 |
6.4 |
| Uphill angle(Slope) |
21° |
21° |
21° |
21° |
21° |
| Weight of the rig(T) |
11 |
12 |
12.5 |
17 |
23 |
| Dimension(M) |
6.32*1.7*2.39 |
6.32*1.7*2.39 |
6.52*1.85*2.51 |
6.73*2.1*2.63 |
7.3*2.25*2.75 |
| Working condition |
Unconsolidated formation and stone head |
| Drilling method |
Top drive hydraulic rotary and pushing, hammer or mud drilling |
| Matched DTH hammer |
Medium and high air pressure series |
| Optional accessories |
Mud pump,Centrifugal pump,Generator,foam pump |
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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