What are the main characteristics of swivel tube core barrel
The main characteristics of swivel tube core barrel are as follows:
1. High quality coring: During the drilling process, the outer tube drives the drill bit to rotate and break the rock, while the inner tube remains stationary, avoiding mechanical crushing of the rock core caused by friction and vibration generated by the rotation of the drilling tool. This can keep the rock core in its original
The main characteristics of swivel tube core barrel are as follows:
1. High quality coring: During the drilling process, the outer tube drives the drill bit to rotate and break the rock, while the inner tube remains stationary, avoiding mechanical crushing of the rock core caused by friction and vibration generated by the rotation of the drilling tool. This can keep the rock core in its original state with high integrity, especially suitable for coring operations in complex formations such as loose, broken, and prone to collapse. It can effectively prevent the rock core from being ground, disturbed, or damaged.
2. Protect the rock core from being washed away by the flushing solution: Circulating water flows from the inner and outer pipes to the bottom of the hole through the water distribution joint, and the rock core is located in the inner pipe, avoiding direct flushing by the flushing solution. This enables better preservation of the structure and composition of the rock core, which is beneficial for subsequent correct analysis and research of the rock core.
3. Reliable card core: The inner tube is equipped with card spring seats, card springs and other card core devices. After the drilled core enters the card spring seat and card spring, it will be firmly fixed, and even if the core is broken, it will not slide down, ensuring that the core can be completely stored in the inner tube and improving the core recovery rate.
4. Wide applicability: By replacing different types of drill bits and adjusting related components, it can be applied to various rock types and geological conditions, such as formations with frequent alternation of soft and hard, thin coal seams with multiple and unstable gangue inclusions, jointed rocks, and fibrous rocks and ores.
5. Advantages in drilling efficiency: Some improved single action double tube core drilling tools, such as screw driven rope coring single action double tube impact rotary drilling tools, can use the impact hammer mechanism and driving mechanism to drive and produce the impact hammer effect, achieving impact rotary drilling and improving drilling efficiency.
6. Easy operation and maintenance: The structure is relatively simple, easy to assemble and disassemble, and convenient for on-site operation and maintenance. Staff can easily inspect, repair, and maintain drilling tools, reducing usage costs and labor intensity.
7. Can reduce the cost of drill bit wear: The design of some single action dual tube core drilling tools allows for the replacement and updating of individual drill teeth. When the drill bit wears out after drilling, there is no need to replace the entire drill bit, only the worn drill teeth need to be replaced, thus saving costs.
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