In some loose and unstable rock formations, problems such as collapsed holes and burial often occur during drilling. How to avoid this series of problems? After years of on-site practice and research, we have found that the eccentric drilling tools can be effectively applied to sediment layer or pebble layer with small particles, and the depth of pipe following is within 30 meters, which can easily realize the pipe following.
Concentric drilling tools have the widest applicability to the stratum, not only can they cope with the stratum conditions of eccentric and slider, but also can cope with the large dead rocks and caves, etc. The depth of the following pipe can reach about 100 meters, and the efficiency of the following pipe drilling is fast, and it can also be used in the field of foundation piles.
Composition of two drilling tools
Concentric drilling system consists of pipe shoe, reaming sleeve and center drill bit from left to right. The shoe is used to connect the root canal and the reaming sleeve connects the center bit to the shoe. The center bit is the main structure of the tool, with alloy teeth and air hole evacuation flutes. Advantages of the center bit are that it can guarantee the straightness of holes in different geological structures, it has less torque than eccentric drilling tools, and it is more suitable for urban construction due to its smooth drilling, low vibration and low noise compared to eccentric drilling tools.
Eccentric drilling tools are composed of eccentric stabilizers, locking systems, eccentric wheels and eccentric drill bit, featuring eccentric wheels that can increase the wear resistance of the eccentric back face and extend the service life of the eccentric wheels, and the threaded end of the eccentric drilling bit leaves deformation concessions for easy disassembly.
Scope of application of drilling tools
Concentric drilling tools are suitable for overburden with complicated geological conditions, such as pebbles, fissures, dead stones, drifting stones, construction backfill waste and other scenes. Concentric drilling tools can be used for drilling holes at any angle, and can be used for drilling holes with a high degree of straightness to a maximum depth of 150 meters.
Pile foundation: Concentric follow-through drilling tools are suitable for use in pile foundation projects due to their smooth drilling, high straightness of holes, and the influence of geological conditions such as layers.
Anchoring: The drilling tools are not subject to the pebbles in general, the drilling tools are in a non-vertical state during anchoring operation, and the geological conditions are relatively complicated. Because the concentric drilling tools can drill at any angle, they are not affected by geological conditions and meet the actual needs of anchoring works.
Eccentric drilling tools are suitable for covering layers of loose material, such as soil, clay, weathered rock, sand and gravel particles.Water wells: Eccentric drilling tools are used as the main tool for drilling water wells, ensuring that the drilling is carried out at the same time as the shielding wall, which significantly reduces the time required to pass through the overburden.
Foundation support: The eccentric drilling system is the fastest and most economical drilling tool system for permanent or temporary use of steel pipe shoring in soil, silt, sand and gravel conditions.
Anchoring: When high rocks on slopes need to be reinforced, the Eccentric Heeler System effectively meets the needs of anchoring operations.
Summary
The difference between eccentric drilling tools and concentric drilling tools is that they are adapted to the loose conditions of the ground, both can be used for anchoring, and eccentric drilling tools can be used for drilling water wells. Select the appropriate drilling tools tailored to your unique circumstances, or reach out to us to find the most suitable and superior matching ones for your needs. D Miningwell, as a drilling tools manufacturer with twenty years of production experience, insist on providing customers with the best quality drilling tools as well as the cheapest drilling tools price.
