If the construction hole diameter is 1.5-5.0m and the stratum is moderately weathered rock or sandy cobble layer (f=6-12), the three-ring reverse circulation roller cutter is preferred. It has higher cost performance and lower maintenance cost, and is suitable for small and medium-sized reverse circulation drilling projects, such as municipal pile foundations and small raise construction.
If the construction hole diameter is 3.0-8.0m and the stratum is hard rock or large particle size cobble layer (f=10-18), the four-ring reverse circulation roller cutter is preferred. It has higher rock-breaking efficiency and wear resistance, can bear greater rock-breaking load, is suitable for deep hole construction such as large vertical shafts and mine main shafts, and can effectively shorten the construction period.
Keywords: Rock-Breaking Tools
3-Ring & 4-Ring Spherical Tooth RCD Roller Cutter Multi-Ring Reverse Circulation Roller Cutter
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