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HQ3 Diamond Core Reamer OD 95.9mm Q Series Reaming Shell
HQ3 (also known as HQTT) is a deep hole / heavy-duty large-diameter diamond reaming tool in the Q series rope core system. It is an enhanced and upgraded version of HQ, specifically designed for ultra-deep holes (1800–2500m), hard rock / extremely abrasive formations, and high-torque high-load scenarios.
Applicable drilling tools: HQ3 rope core dual pipe, HQ3 drill rod, HQ3 drill bit
English Name:HQ3 Reaming Shell / HQTT Reamer / HWL3 Reamer
Material: Diamond
Outer diameter: 96.09 millimeters
Minimum order quantity: 1 piece
Description
HQ3 (also known as HQTT) is a deep hole / heavy-duty large-diameter diamond reaming tool for the Q series rope core system. It is an enhanced and upgraded version of HQ, specifically designed for ultra-deep holes (1800–2500m), hard rock / extremely abrasive formations, and high torque / high load scenarios.
It is installed between the HQ3 drill bit and the core outer pipe. Its core functions include strong diameter retention, enhanced alignment, heavy-duty pipe protection, and stable bore wall. It is the main tool for deep metal mining, geothermal exploration, and scientific drilling.
Applicable drilling tools: HQ3 rope core dual pipe, HQ3 drill rod, HQ3 drill bit
Material: Diamond
Outer diameter: 96.09 mm
Minimum order quantity: 1 piece
Specifications
| Size | Bit O.D.Hole Diameter（mm） | Bit I.D.Core Diameter (mm) | Reaming Shell O.D. (mm) |
| BQ | 58.9 | 36.4 | 59.95 |
| BQ3 | 58.9 | 33.53 | 59.95 |
| NQ | 75.3 | 47.6 | 75.7 |
| NQ3/NQTT | 75.3 | 45.1 | 75.7 |
| HQ | 95.6 | 63.5 | 96.09 |
| HQ3/HQTT | 95.6 | 61.1 | 96.09 |
| PQ | 122 | 85 | 122.65 |
| PQ3 | 122 | 83 | 122.65 |
Structure and Materials (Enhanced Design)
1. Ultra-high Strength Matrix: 40CrNiMoA advanced alloy steel forged, quenched and tempered, with torsion / vibration / deformation resistance 40% higher than standard HQ, suitable for ultra-deep holes with high loads.
2. Super Strong Wear-resistant Mat: Ultra-fine tungsten carbide + high hardness bonding phase formula, with a temperature resistance of 1200°C, suitable for extremely hard rocks, strong grinding, and crushed strata.
3. Diamond Working Layer (Heavy Load Preferred):
* Inlaid Diamond (Standard Option): High-strength fine-grained diamond, with a wear resistance improvement of 50%+ compared to standard HQ, preferred for hard rocks / deep holes.
* PCD Composite Sheet (Strengthened Type): The cutting section is embedded with multi-angled PCD, with extremely strong resistance to impact and grinding, with a single insert capable of advancing up to 4000 meters +.
* Surface Set Natural Diamond (Soft Rock Rapid Type): Fast advancement, smooth chip removal, suitable for medium-hard intact strata.
* Heavy Load Spiral Water Channel: 4 spiral edges + widened and deepened water channel + inclined slope for enhanced guidance, water flow increased by 30%, faster chip removal, 35%+ reduction in resistance, strong ability to prevent core blockage in deep holes.
Core Advantages (Compared to Standard HQ)
1. Ultra-deep Hole Stable Pitting: φ96.509mm precise pitting, triple compound pitting, 2500m deep hole without diameter reduction or stuck drill, sufficient gap for changing drill bits.
2. Heavy-duty Strong Centering and Anti-Slip: Thickened three pads + extended guide section, reduces drill rig vibration and oscillation, hole deviation control ≤ 0.5°/100m, suitable for directional / controlled drilling.
3. High Efficiency Long Life: Single drill bit advance 3500–4000 meters, pure drilling time 300 hours +, crushing / grinding formation life leads standard HQ by 50%+.
4. High Resistance to Torsion and Breakage: Strengthened thread + high toughness matrix, torsion strength increased by 40%+, not prone to breakage or disengagement under deep hole high torque.
5. Comprehensive Protection for Drill Bits: Shares radial heavy-duty wear, significantly extends the lifespan of the outer pipe, drill rod and drill bit, and reduces the overall cost of ultra-deep holes.
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