Large diameter and widely spaced chisel or sharp conical carbide insert with high projection. Small flat inserts placed in between, on gage and inner rows to prevent cone shell erosion. Laser hard faced spot deposits to arrest steel erosion. Additional flush space on shirttail for quick evacuation of cuttings.
Benefits: Vibration free drilling resulting in maimum penetration rates in very soft formation
Applications: suitable for Sand, Mudstone, Sandstone type sedimentary formations with low compressive strenghs of 20 to 60 Mpa
Large diameter and widely spaced chisel or sharp conical carbide inserts with high projection. Small flat inserts placed in between, on gage and inner rows to prevent cone shell erosion. Hard faced cone shell to delay erosion and exposure of active inserts.
Benefits: High penetration rates in soft formation along with vibration free drilling.
Applications: Suitable for Shale, Lime stone, Sandstone, Gravel - Soft formations with compressive strengths of 50 to 110 Mpa.
Moderately spaced conical inserts with medium projection. Doublerow gage protection inserts. Hard metal deposit on nose area to protect against cone shell erosion.
Benefits: Good penetration rates and longer life in medium hard and moderately abrasive formation. Longer bearing due to Smooth Drilling.
Applications: Suitable for Granite, Marble, Hard Sandstone - Medium Hard formations with Compressive Strengths of 90 - 150 Mpa.
Closely spaced conical or spherical Inserts with medium to low projection. Hard metal deposit on nose area to protect against cone shell erosion.
Benefits: Good penetration rates in hard, consolidated and very abrasive formation. Longer bearing due to Smooth Drilling
Applications: Suitable for Dolomite, Granodiorite, Quartzite, Magnetite, Banded Hematite Quartzite. Formation of 150 to 250 Mpa. and banded iron and abrasive consolidated formations with compressive strengths of above 200 Mpa.
Closely spaced conical or spherical medium to low projection crack resistant tough carbide Inserts. Load balanced layout of inserts
Benefits: Stable penetration rates in very abrasive formation. Longer bearing life due to smooth drilling.
Applications: Quartzite, Taconite, Banded Iron. Very hard grade formations of 260 to 400 Mpa
Aggressive and robust teeth protected with Tungsten carbide hard facing for extended performance
Benefits: Good penetration rates in unconsolidated and unfavourable rock conditions
Applications: Clay,Sand,Sandstone, Gravel,Silt stone, Mud Stone formations Compressive strengths upto 100 Mpa