Mining Core Bits
New Patended concepts
In order to improve core bits tool life and their drilling efficiency, our new product lines involved the use of diamond aggregates comprising both peripherical diamonds and peripherical fused/cast tungsten carbides.
General erosion profile for better directional drilling control
Transversal Width Cut
Reduced Diamonds' Protusion In mixtures
In conventional mixture, finer diamond grit’s comet tails hinder and/or reduce coarser grit’s protusion. Finer grits play the role of fused/casted tungsten carbides. Finer grits harden the main matrix leading, consenquently, to reduced cutting performance of the diamond tool.
mono versus multi protusions
L = Tail’s Width
P = Number of Protusions
Diamonds aggregates increased protrusion
At constant diamond’s concentration, aggregated diamond’s protusions are concentrated in deliminated areas of diamond tool’s inserts/segments. This, in turn, allows easier matrix erosion around & before those deliminated areas.
Also, if H3=H1, then S3<(S1+S1-2+S1-3+S1-4+S2)
Aggregates erosion progression - front view
1° Matrix erosion starts.
Aggregates occur on surface
2° Weight Loss increases.
Channels formation on surface
3° Weight Loss stops.
Shearing-Off cutting mode takes place
Aggregates erosion progression - profile view
1° Aggregates occur on working surface
2° Front aggregates protrude
3° Back aggregates protrude
Front aggregates erode
4° First layer aggregates erode
Second layer aggregates occur
5° Front aggregates disapear
Second layer aggregates protrude
6° First layer aggregates disapear
New cutting cycle with 2ns layer