- Definition
- PDC core bit is a special drilling tool equipped with polycrystalline diamond compact (PDC) cutters.
- It is designed to cut the outer annular area of rock while retaining a continuous, intact rock core in the center.
- Different from noncore PDC bits, its core function is core recovery for geological analysis, rather than just drilling holes.
- Basic Features
- Hollow annular structure, specially used to reserve rock cores.
- PDC cutters are wear-resistant and sharp, mainly cutting rock by shearing and scraping.
- Most adopt matrix body, with strong wear resistance and erosion resistance.
- Usually used with wireline drilling systems to improve core recovery efficiency.
- Application Scenarios
- Widely applied in geological exploration and mineral exploration.
- Suitable for water well drilling, coal mine exploration and oil-gas core drilling.
- Applicable to medium-hard to hard formations such as sandstone, limestone and dolomite.
- Advantages
- Higher drilling speed compared with traditional core bits.
- Longer service life, wear-resistant and corrosion-resistant.
- Able to obtain intact rock cores, ensuring the accuracy of geological analysis.
- Easy to operate and low maintenance cost.
- Specifications
| Name of product | PDC core drill bit | |||
| Size | Imperial | Size For Rock Core Pipe Casing | Height | Weight |
| 75mm | 3" | 73mm | 120mm | 1kg |
| 93mm | 3 3/4" | 89mm | 120mm | 1.22kg |
| 112mm | 4 1/2" | 108mm | 120mm | 1.54kg |
| 132mm | 5 1/8" | 127mm | 120mm | 1.8kg |
| 152mm | 6" | 146mm | 120mm | 2.06kg |
| 171mm | 6 3/4" | 164mm | 120mm | 3.2kg |