Electroplated Diamond Core Bits vs. Roller Bits
Aug 19,2025
1. Electroplated Diamond Core Bits: Precision Sampling Technology
▲ Key Technical Attributes
Parameter | Specification | Operational Impact |
|---|---|---|
Diamond Distribution | 0.3-0.8mm gradation (25→8 carats/in²) | Balanced cutting efficiency vs. matrix integrity |
Coating Thickness | ≤1.2mm | Enables Ø60mm miniaturized coring |
Fluid Channel Design | 42°±3° helix angle | 98.6% core recovery in granite (Sichuan Basin field test) |
● Primary Applications
- Geological Surveying: 95% core integrity in gneiss formations for radiometric dating
- Mineral Exploration: 8.3m/run penetration in 120MPa quartzite (30% cycle time reduction)
- Concrete Inspection: ≤0.5mm diameter deviation compliant with ISO 6784
Suppliers like SUNGOOD TECH utilize magnetron sputtering to enhance diamond-matrix bonding, extending bit life in >150°C environments.
2. Diamond-Enhanced Roller Bits: Hard Formation Penetration
▲ Structural Configuration
Component | Engineering Specification | Function |
|---|---|---|
Roller Modules | 12 units × 1600ct PCD clusters | Distributive load-bearing (18kN/point) |
Self-Sharpening Design | 0.1mm diamond micro-projections | Sustained cutting points exposure |
Vibration Damping | Vortex-control grooves | Limits deviation to 0.5°/10m |
● Performance-Driven Use Cases
- Basalt Drilling: Achieves 4.2 m/h ROP (3× conventional roller cones)
- Geothermal Wells: Maintains functionality at 350°C BHT
- Fault Zone Drilling: 100+ hours continuous operation in conglomerate formations
3. Comparative Analysis: Contextual Selection Guidelines
Performance Metric | Core Bits | Roller Bits | Complementary Scope |
|---|---|---|---|
Optimal UCS Range | ≤150MPa | ≥120MPa | Full coverage 30-250MPa |
WOB Sensitivity | ±8% | ±15% | Automated pressure matching |
Economic ROP Window | 3-10 m/h | 2-8 m/h | 40% combined efficiency gain |
● Field Validation: South China Sea Gas Hydrates
- Core bit: Extracted 12.8m continuous hydrate cores (30% saturation)
- Roller bit: Advanced 58m/day through 180MPa basalt substrata
- Integrated benefit: 17-day/well drilling cycle reduction
4. Technical Evolution Pathways
- Real-time wear monitoring: Fiber-optic embedded coatings
- Modular function switching: Convertible core/roller configurations
- Deep-sea adaptation: Titanium matrix withstands 100MPa hydrostatic pressure (Mariana Trench simulation)
Access validated technical parameters:
Electroplated Bit Performance Database – SUNGOOD TECH
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