Advantages of water well drilling rig with foam device:
1. The life of drill bit is extended, and the drilling of water well drilling rig is less affected by climate;
2. Improved slag return speed;
3. In the drilling process of water well drilling rig, it is not necessary to use mud pump, and it does not need to spend a lot of time to maintain mud pump;
4. In the process of drilling, the aquifer is not easily blocked by drilling fluid, and the amount of water is directly observed;
5. The torque used in drilling is much smaller than that in rotary drilling, and the rotary speed is also very low, generally 10-30r /min;
6. The drilling rate is fast in consolidated rocks, 5.5 times faster in air-foam DTH hammer drilling in sandstone formations than in traditional drilling technology with mud cone, and 10 times faster in granite, basalt and other high-hardness igneous rock formations than in mud cone drilling;
7. Reduce the average drilling cost per meter and shorten the completion period;
8. Drilling with air foam cone is 1.54 times faster than drilling with mud cone in coal measure stratum, mud shale and fine sand stratum;
9. The drilling pressure required is small (907-1814 kg, depending on bit size and formation hardness). Centralizer or drill collar is not required to keep the drill hole vertical.
Disadvantages of water well drilling machine with foam device:
It is limited to drilling in rock formations with good consolidation and hardness, and requires a large air volume air compressor.
Concluding remarks: The air-foam drilling process is one of the most ideal drilling processes for drilling in well-consolidated and hard-wearing formations. It has the characteristics of foam drilling and high air drilling efficiency. The short cycle and low cost of well formation have good application prospects in the construction of water well drilling rigs in bedrock areas.
