Coring System
Core Barrel / Casing
Double/triple tube core barrels for wireline and conventional coring, BQ/NQ/HQ/PQ specs. Complete overburden casing systems for loose and collapsing formations.
Product Overview
Core barrel and casing product line covers full range of double and triple tube core barrels for wireline and conventional coring operations. Essential tools for geological exploration, mineral drilling and scientific drilling projects to obtain high-quality core samples.
Core barrels offer four standard sizes: BQ, NQ, HQ and PQ, covering different hole diameters and drilling depths. Inner tubes are available in split-type (for conventional coring) and non-split type (for wireline coring), ensuring maximum core recovery even in fractured or soft formations.
Overburden casing systems are used for stabilizing unstable boreholes, preventing borehole collapse and ensuring smooth drilling operations. All components are manufactured with precise tolerances and surface hardening treatment for longer service life in abrasive formations.
Core Advantages
Double/Triple Tube Options
Double tube for standard coring, triple tube for improved core protection especially in fractured formations
Wireline Compatible
Full wireline coring system compatibility, efficient coring without tripping drill string
Complete Casing System
Overburden casing, drive shoes and auxiliary tools for loose and collapsing formations
Surface Hardening
Inner tube chrome plating and outer tube hardening treatment maximizes wear resistance
Core Barrel Specifications
| Size | Hole Diameter (mm) | Core Diameter (mm) | Tube Type | Max Depth (m) | Wall Thickness (mm) |
|---|---|---|---|---|---|
| BQ | 60 | 36.5 | Double / Triple | 1500 | 3.5 |
| NQ | 76 | 47.6 | Double / Triple | 2000 | 4.0 |
| HQ | 96 | 63.5 | Double / Triple | 2500 | 4.5 |
| PQ | 123 | 85.0 | Double / Triple | 1500 | 5.0 |
Casing System Specifications
| Size | OD (mm) | ID (mm) | Thread Type | Standard Length (m) |
|---|---|---|---|---|
| BQ Casing | 60 | 50 | Threaded | 1.5 / 3.0 |
| NQ Casing | 76 | 64 | Threaded | 1.5 / 3.0 |
| HQ Casing | 96 | 82 | Threaded | 1.5 / 3.0 |
| PQ Casing | 122 | 105 | Threaded | 1.5 / 3.0 |
Typical Application Areas
Mineral Exploration
High core recovery sampling for ore body evaluation and resource estimation
Geological Survey
Stratigraphic analysis and geological structural mapping
Scientific Drilling
Environmental coring, ice cores and scientific research applications
