Reverse Circulation RC Drilling

Advantages and disadvantages of impact Reverse Circulation RC Drilling rig and rotary drilling rig in the construction process:

According to the projects that have been constructed, different formations and different areas but the drilling diameter is the same for comparison, it is found that impact Reverse Circulation RC Drillingand rotary positive circulation each have their own advantages. During the construction, the drilling record report was reported by small shifts, and the average data analysis of each process was taken.

The rotary drilling rig was 1.2 times faster than the percussion Reverse Circulation RC Drilling rig. Medium construction is not as fast as rotary positive circulation drilling rig, but in pebble gravel layer and bedrock construction, Reverse Circulation RC Drilling is obviously 3 times faster than rotary drilling rig, generally more than 2 times faster for gravel below 5cm, and faster than 5~10cm gravel In addition, Reverse Circulation RC Drilling is 5 to 6 times faster than rotary drilling in rocks below grade 5.

From the analysis of the above situation, Reverse Circulation RC Drilling can be used in complex formations such as pebble layers, rock-socketed layers, etc. The hole-forming speed of the bored pile has obvious advantages, especially in some hilly and mountainous areas, and the superiority is more obvious.

There are mainly the following points of reverse circulation drilling tools:
1. Based on the experience of ordinary DTH Hammer in the past, combined with the use characteristics of RC drill hammer, the internal structure is optimized to make the energy transfer ideal, so as to ensure that the series of hammer have a fast drilling speed and stable and continuous sampling.
2. The internal structure is very simple, and the parts are rigid, thus ensuring long life of the hammer and simple and convenient maintenance.
3. The collection tube adopts an integrated type, which can be replaced without disassembling the hammer. The collection tube is carburized for good wear resistance.
4. The RC drilling matching drill bit adopts a patented design, only need to replace the drill bit, the same hammer can drill holes of different sizes, and it can ensure that the sample is not polluted.
5. Sampling can be done well under various difficult conditions such as loose soil, hard rock and a lot of water.