The drill rod of a core drilling rig is an important tool for geological exploration and core sampling operations, and its characteristics mainly include:
1. * * High strength material * *: In order to cope with the drilling pressure and friction of underground hard rocks, drilling rods are usually made of high-strength alloy steel or other high-performance materials to ensure their stability and durability in high-pressure and high-temperature environments.
2. Good wear resistance: Due to long-term contact with hard materials such as rocks, drill rods need to have excellent wear resistance to extend their service life and ensure drilling efficiency.
3. * * High precision machining * *: The inner and outer surfaces of the drill rod need to be processed with high precision to ensure good straightness and concentricity, which is crucial for improving drilling quality and obtaining accurate core samples.
4. Good sealing performance: In some designs, sealing devices are added inside the drill pipe or at the joints to prevent mud or other fluids from infiltrating, affecting the drilling process or causing equipment damage.
5. * * Easy to connect and disassemble * *: Considering the convenience in practical operation, drill rods are usually connected quickly (such as threaded connections), which facilitates on-site workers to quickly assemble or replace components.
6. Strong adaptability: The design of drill pipes may vary depending on different geological conditions and work requirements, such as length, diameter, and the selection of special functional modules (such as cooling systems) to adapt to various complex working environments.
7. * * Lightweight Design * *: In order to reduce the burden on workers and improve work efficiency, some modern drill rods use lightweight materials and technologies, achieving structural optimization and weight reduction.
In summary, the drill rod design of the core drill rig comprehensively considers multiple aspects such as strength, wear resistance, and accuracy, aiming to meet the requirements of efficient and accurate core sampling.