The pneumatic water well drilling rig mainly has the following characteristics:
Power advantage
Clean power source: Powered by compressed air, compared to fuel or electric drive, it does not require storage and transportation of fuel, avoids complex power wiring, and does not produce exhaust emissions. It is very environmentally friendly, especially suitable for areas with high environmental protection requirements, such as nature reserves, urban residential areas, etc. for water well drilling operations.
Quick and flexible start-up: It can quickly start and stop, adjust the working status according to the actual needs of drilling operations, and improve operational efficiency. In some complex drilling conditions that require frequent start stop equipment, the advantage of this characteristic of pneumatic water well drilling rig is obvious.
Drilling performance
High impact energy: By driving the impactor with compressed air, a large impact energy can be generated, which can effectively break various rocks and soil layers, adapt to various geological conditions from soft soil layers to hard rock layers, and achieve high drilling efficiency in hard rock formations.
Fast drilling speed: Its impact frequency and torque can be adjusted according to different geological conditions, enabling fast drilling, shortening the drilling time of individual water wells, and improving overall operational efficiency. Especially in large-scale water well drilling projects, it can significantly save construction time and costs
Main technical parameters of 200 meter pneumatic drilling rig:
| Model | Shitan ST 200 |
Max drilling depth | M | 200 |
Drilling diameter | mm | 105-350 |
Air pressure | Mpa | 1.2-3.5 |
Rod length | m | 3 |
Rod diameter | mm | 76-89 |
Main shaft pressure | T | 4 |
Lifting force | T | 18 |
| Power head stroke | M | 40 |
Max rotary torque | Nm | 5900 |
Max rotary speed | r/min | 30-120 |
Secondary winch liftng force | T | 1 |
Jacks stroke | m | 1.35 |
Moving speed | km/h | 2.5 |
Uphill angle | Slope | 21° |
Weight of the rig | T | 5.5 |
| The engine | Xidong 65kw |
Overall dimensions | 4400*2150*2200mm |
Working condition | Loose layer and bedrock |
Drilling method | Hydraulic rotary, down-the-hole impactor |
Pneumatic water well drilling rig is a device that uses compressed air as a power source to drive the drilling rig for drilling operations. Its working principle mainly involves the following aspects:
1. Compressed air generation and transmission:
Firstly, high-pressure compressed air is generated by an air compressor. Air compressors are driven by power devices such as electric motors or diesel engines to suck in and compress air, increasing its pressure. Compressed air is transported through pipelines to various working components of the drilling rig.
2. Principle of impact drilling:
Compressed air is transported inside the drill rod and then reaches the drill bit. At the drill bit, compressed air is sprayed out at high speed through special nozzles or air holes, forming a strong airflow. This high-speed airflow drives the drill bit to perform impact motion, continuously impacting the rock at the bottom of the well and breaking it into small pieces. At the same time, the pressure difference formed by the airflow at the bottom of the well can also help carry rock debris to the surface.
3.Rotary drilling principle:
In addition to impact motion, pneumatic water well drilling machines also rotate the drill rod and drill bit. Usually, the rotation of the drill rod is achieved through pneumatic motors or other transmission devices. Rotating drill bits can more effectively break rocks and make the broken rock fragments easier to be carried out of the wellhead by airflow. During the drilling process, the rotation speed and impact frequency of the drill bit can be adjusted according to the properties of the rock and drilling requirements.
4. Slag discharge and wall protection:
During the process of impact and rotary drilling, high-pressure airflow also plays an important role in slag discharge. The airflow blows the broken rock debris upwards along the annular space between the drill pipe and the wellbore, thereby maintaining the cleanliness of the wellbore and avoiding the accumulation of rock debris that affects drilling efficiency. At the same time, for some unstable formations, a special protective medium (such as mud, etc.) can be injected into the well to form a layer of protective wall on the wellbore wall, preventing the collapse of the wellbore wall.
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