Root canal drills are different from straight-line drills. The canal drills are mainly used for hard, loose, broken or pebbles.
It is necessary to follow up the drilling of the stratum of the casing at the same time, which has the advantages of good wall protection performance and high drilling efficiency.
The working principle of root canal drill:
1. At the beginning of rock drilling, the eccentric reaming sleeve is unscrewed along the center guide bit, and reaming is started at the same time to ensure that the casing and the drilling system advance at the same time.
2. After the follower pipe is drilled in place, carefully reverse the direction, rotate the eccentric reaming sleeve, and pull out the eccentric drilling tool system from the casing.
3. Pull the casing upward, and spray concrete slurry or other fillers at the bottom of the hole at the same time.
4. Use conventional drilling tools to drill to the required depth in the bedrock.
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