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The Pdc Arc Angle Drill Bit is a specialized drilling tool designed for projects that require maximum borehole stability and smooth penetration. Its unique rounded wing profile (arc corner) minimizes friction against the borehole wall, reducing torque fluctuations and preventing wall damage during high-speed rotation. This bit is an excellent choice for water well drilling and geological exploration in medium-hard strata.
Key Features
Smooth Arc-Corner Design: The rounded wing edges provide a "buffering" effect, ensuring a smoother drilling experience and superior borehole wall protection.
Aggressive Cutting Structure: Outfitted with premium PDC cutters arranged to provide high penetration rates (ROP) while maintaining balanced tool face torque.
Optimized Hydraulic Flow: Large junk slots and integrated water ports allow for rapid cooling and efficient removal of cuttings, preventing bit balling in sticky layers.
High-Strength Steel Body: Precision-machined from high-grade alloy steel with a professional anti-corrosion gold coating for long-lasting durability.
Impact Resistance: The reinforced blade design is specifically engineered to handle the stresses of interbedded formations.
| Feature | Specification |
| Bit Type | Arc Corner / Rounded Wing PDC Bit |
| Body Material | High-Grade Alloy Steel |
| Blade Design | Arc-profiled Wings |
| Formation Range | Soft to Medium-Hard (Shale, Sandstone, Marl) |
| Cutter Technology | High-Toughness Premium PDC |
| Connection Thread | API Standard / Support Customization |
Arc Corner Design: The rounded wing profile minimizes cutting damage to the borehole wall, ensuring a stable and precise hole diameter.
Smooth Operation: This design effectively buffers drilling impacts, leading to reduced vibration and lower load on the drilling rig.
High-Flow Hydraulics: Wide junk slots and optimized fluid channels ensure that cuttings are discharged rapidly while keeping the bit cool.
Grade | Protodyakonov Coefficient (f) | Representative Formations/Rocks | Recommended Drill Bits |
Grade 1 (Loose Soil) | 0.3~1.0 | Secondary loess, secondary red rock, soft sand without gravel/breccia, diatomite | PDC drag bit、 PDC reaming bit、 PDC combined guide bit |
Grade 2 (Loose Rock) | 1~2 | Yellow rock, red soil, peaty clay, sand soil, kaolin-type formations | PDC drag bit、 PDC reaming bit、 PDC combined guide bit |
Grade 3 (Lightly Soft Rock) | 2~4 | Strongly weathered shale/slate/grazing rock/schist/micro-cemented sand layer | PDC drag bit、 PDC reaming bit、 PDC combined guide bit |
Grade 4 (Slightly Soft Rock) | 4~6 | Shale, sandy shale, oil shale, carbonaceous shale, calcareous shale, sandy shale interlayer, argillaceous limestone | PDC drag bit、 PDC concave drill bit、PDC arc angle drill bit、PDC reaming bit、 PDC combined guide bit |
Grade 5 (Slightly Hard Rock) | 6~8 | Gravel layer, crushed stone layer, collapsed argillaceous slate, sericite-chlorite greenstone slate, schist, limestone, marble | PDC drag bit、 PDC concave drill bit、PDC arc angle drill bit、PDC reaming bit、 PDC combined guide bit |
Grades 6–7 (Medium-Hard Rock) | 8~12 | Chlorite, mica, slate, dry wood rock, schist, silicified limestone, calcite | PDC concave drill bit、PDC arc angle drill bit、PDC reaming bit、 PDC combined guide bit |
Grades 8–9 (Hard Rock) | 12~16 | Silicified mica rock, gneiss, basalt, diorite, pyroxenite, quartz Anshan porphyry | PDC concave drill bit、PDC arc angle drill bit、PDC reaming bit、 PDC combined guide bit、Tricone Drill Bit |
Grades 10–11 (Extremely Hard Rock) | 16~18 | Granite, granodiorite, gneiss, rhyolite, quartzite | PDC concave drill bit、PDC arc angle drill bit、PDC reaming bit、 Flat Matrix、 Tricone Drill Bit |
Grade 12 (Extremely Hard Rock) | 18~20+ | Quartzite, jasper, hornfels, corundum rock, quartz, flint, jasper | PDC reaming bit、 Flat Matrix、 Tricone Drill Bit |
