What are the characteristics of core barrel spare parts
Core barrel spare parts generally include single action double tube drilling tool accessories and double action double tube drilling tool accessories. Different types of accessories have different characteristics. The following is an introduction to the main features:
1. Single action double tube drilling tool accessories
High quality coring: When the outer tube rotates, the inner tube do
Core barrel spare parts generally include single action double tube drilling tool accessories and double action double tube drilling tool accessories. Different types of accessories have different characteristics. The following is an introduction to the main features:
1. Single action double tube drilling tool accessories
High quality coring: When the outer tube rotates, the inner tube does not rotate, avoiding direct flushing of the rock core by the flushing liquid and reducing the mechanical breakage of the rock core caused by the frictional vibration generated by the rotation of the drilling tool. This can better maintain the integrity of the rock core and improve the quality and recovery rate of coring.
The core sample has a large diameter and is not easily worn: the inner tube can effectively protect the core sample, making the diameter of the obtained core sample relatively large. During the drilling process, the inner tube does not rotate, reducing the wear on the core sample and allowing it to better maintain its original state.
Large mud channel area: The mud channel area formed between the inner and outer pipes is relatively large, which is conducive to the circulation of flushing fluid, can effectively carry rock debris, and reduce the occurrence of drilling accidents.
Adapt to multiple tests: able to adapt to the in-situ testing requirements and hydrological experiments of different methods in the borehole, providing more data support for geological exploration and other work.
2. Double action dual tube drilling tool accessories
Simple structure: The overall structure is relatively simple, the manufacturing difficulty is relatively low, the cost is relatively low, and it is easy to promote and apply in actual production.
Widely applicable to geological strata: The design of the inner and outer pipes that can rotate simultaneously makes it suitable for drilling in rock and mineral layers with drillability of level 6, which are soft and prone to collapse, and drillability of level 7-9, which are medium hard, fragmented, and easily eroded. It can play a role in various complex geological conditions.
Avoid direct flushing: During drilling, the flushing fluid flows between the inner and outer pipes, which can avoid direct flushing of the rock (ore) core, protect the core to a certain extent, and reduce the erosion and damage of the core by the flushing fluid.
Beneficial for core entry into the core tube: The vibration during the drilling process of the inner core tube is beneficial for the core to enter the core tube and prevent the core from getting stuck inside the core tube, improving the efficiency and quality of core extraction.
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