Hot-Pressed Wireline Core Bit for Deep Hole Coring
Multi-Formation Adaptability
High Core Recovery Rate
Wear-Resistant & Durable
The hot-pressed wireline core bit is specifically engineered for deep hole rock sampling. Utilizing advanced hot-press sintering technology with multiple models and sintering hardness configurations, it flexibly adapts to soft, medium, and hard formations. The bottom-jet version specifically addresses low core recovery rates in loose sandy and fractured formations. Core retrieval can be completed without tripping the drill string, significantly improving deep hole coring efficiency and core integrity. Suitable for various geological exploration, mineral exploration, and deep hole sampling requirements.
Widely used in geological exploration deep hole rock sampling, mineral resource exploration deep hole coring, engineering geological deep hole sample collection, scientific research deep hole rock sampling, and other applications, especially suitable for long-distance deep hole coring operations.
Core Advantages
Wireline Coring: Efficient & Convenient
Wireline coring structure allows core retrieval without tripping the drill string. The core barrel is directly lifted to the surface via wireline, significantly reducing downtime for deep hole coring, lowering labor intensity, and improving sampling efficiency. Suitable for operations from hundreds to thousands of meters deep.
Hot-Press Sintering: Wear-Resistant & Durable
The bit head uses hot-press sintering technology with tight bonding and uniform hardness, providing excellent wear resistance, reduced cutter breakage and chipping. Different sintering hardness levels can be selected based on formation rock hardness, extending bit life and reducing deep hole bit change frequency.
Multi-Formation Adaptability & Flexible Configuration
Covers adaptability to soft, medium, and hard formations with three sintering hardness levels (low, medium, high) available as needed. Standard version adapts to conventional formations; bottom-jet version specifically designed for loose sandy and fractured formations with low core recovery rates, meeting various geological coring requirements.
Precise Coring & High Core Integrity
Optimized bit head and core barrel design minimizes core damage and loss during coring. Conventional formations achieve core recovery rate ≥95%, while bottom-jet version achieves ≥85% in loose fractured formations, ensuring rock sample authenticity and integrity for geological data analysis.
Complete Model Range & Wide Adaptability
Covers various common models including AQ, BQ, NQ, HQ, PQ, NTW, HTW with complete size specifications. Can be precisely matched based on deep hole diameter and coring requirements, adapting to different drill rig models and various deep hole coring scenarios.
Bottom-Jet Design for Targeted Adaptation
Bottom-jet hot-pressed bit uses special bottom-jet structure to effectively flush loose sand from hole bottom and stabilize borehole wall, addressing low core recovery rates and core collapse in loose sandy and fractured formations, improving coring stability in special formations.
Applications
Suitable Formations & Sintering Hardness Selection
Conventional Formations (Standard Version)
Widely used in soft, medium, and hard formations, suitable for most geological exploration coring requirements, no special adjustments needed, easy operation.
Special Formations (Bottom-Jet Version)
Specifically designed for loose sandy, fractured formations with low core recovery rates. Effectively stabilizes borehole wall, reduces core loss, improves coring efficiency and quality.
Sintering Hardness Selection (Adaptable to Formations as Needed)
- Low Sintering: Adapts to soft formations (e.g., mudstone, coal seam, soft shale) – smooth cutting, efficient coring
- Medium Sintering: Adapts to medium-hard formations (e.g., red sandstone, limestone, medium-hard shale) – balances efficiency and wear resistance
- High Sintering: Adapts to hard formations (e.g., dolomite, basalt, granite) – wear-resistant and impact-resistant, extends service life
Sintering hardness can be precisely selected based on specific formation rock hardness to maximize coring efficiency and bit life.
Drilling Method
Rotary Drilling (Wireline Coring Specialized Process) – Recommended to use with mud circulation or water circulation. Bottom-jet version requires ensuring bottom-jet channels are clear for effective hole bottom flushing and core stabilization, further improving core recovery rate and drilling stability.
Product Specifications
I. Common Models & Size Parameters (Unit: mm)
| Model | Outer Diameter | Inner Diameter | Model | Outer Diameter | Inner Diameter |
|---|---|---|---|---|---|
| BQ | 60 | 36.5 | HQ3 | 95.6 | 61.1 |
| NQ | 75.3 | 47.8 | PQ | 122 | 85 |
| NQ3 | 75.3 | 45.1 | NTW | 75.5 | 56 |
| HQ | 95.6 | 63.5 | HTW | 95.5 | 71 |
II. Common Model Summary
BQ
NQ
HQ
PQ
NTW
HTW
(Can be flexibly selected based on drill rig model and coring requirements)
III. Sintering Hardness & Style Selection
Sintering Hardness:
- • Low (Adapts to soft formations)
- • Medium (Adapts to medium-hard formations)
- • High (Adapts to hard formations)
(Select as needed, matching corresponding formation rock hardness)
Bit Style:
- • Standard Version (Adapts to conventional soft, medium, hard formations)
- • Bottom-Jet Version (Adapts to loose sandy, fractured formations)
Customization Services
We can customize hot-pressed wireline core bits with special dimensions and sintering hardness based on user’s deep hole coring requirements, drill rig model, and specific formation conditions. Additionally, we can optimize bottom-jet structure to further improve core recovery rates in loose fractured formations.
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Contact us for OEM/ODM service, custom solutions, and technical support for deep hole coring. We respond within 24 hours on business days.
