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The automatic Mazier core barrel is designed for obtaining undisturbed core samples in soft soil by applying downward pressure. The cutting shoe and connected inner barrel projects ahead of the bit when drilling in soft materialand retracts when the drilling pressure increases in harder materials. This greatly reduces the possibility of drilling fluid coming into contact with the core at the point of cutting.
The mazier core barrel has an inner plastic coreliner which protects the sample during transportation to the laboratory. The 74 mm diameter core obtained with the mazier is compatible with the commonly used laboratory triaxial testing apparatus.
Advantages:
. Undisturbed core samples from soft soil 0.1MPa
. Nil wall coefficient
Technical Data
| Specification | Core Barrel Type |
| Mazier 101 | |
| Hole Diameter (mm) | 101 |
| Core Diameter (mm) | 74 |
| Hole Area (cm2) | 80.2 |
| Core Area (cm2) | 43 |
| Thread Connection in Head | CR50 |
| Recommended Drill Rod | CR50 |
| BWY* | |
| BW* | |
| Recommended Casing | M116 |
*Cross-over sub required for drill rods not matching the thread connection in core barrel head
Key to Main Parts of Mazier Core Barrel Assembly
Complete core barrel consists of:
1. Core Barrel Head
2. Inner Tube 1.0m
3. Outer Tube 1.0m
4. PVC Coreliner
5. Basket Core Lifter
6. Cutting Shoe