What is the main function of a swivel -tube core barrel
The swivel -tube core barrel mainly has the following functions:
1. Protecting rock cores: During geological drilling, factors such as mechanical vibration and flushing fluid erosion can easily damage the original structural integrity of rock cores. The outer casing of the single action dual tube drilling tool is relatively independent of the inner core tube. During drilling, the outer casing rot
The swivel -tube core barrel mainly has the following functions:
1. Protecting rock cores: During geological drilling, factors such as mechanical vibration and flushing fluid erosion can easily damage the original structural integrity of rock cores. The outer casing of the single action dual tube drilling tool is relatively independent of the inner core tube. During drilling, the outer casing rotates to cut rocks and break formations, while the inner core tube does not rotate, allowing fragile cores to be stably accommodated inside the core tube. This can reduce the wear and breakage of cores caused by excessive disturbance and friction, and obtain continuous, complete, and intact core samples as much as possible, laying a solid foundation for geological analysis.
2. Improve core recovery rate: Thanks to its special double-layer structure, it can effectively prevent core from falling or losing during drilling. Conventional drilling tools may cause the rock core to collide with the inner wall of the drilling tool and scatter due to vibration and drill rod swing, while single action dual tube drilling tools greatly reduce the probability of such situations, greatly increasing the ratio of the actual length of the rock core extracted to the theoretical drilling depth, ensuring the acquisition of valuable geological samples.
3. Improve drilling efficiency: The cutting edge design of the single action dual tube drilling tool is reasonable, coupled with the flexible structure of the inner and outer tube separation. When dealing with complex formations such as areas where soft and hard rocks alternate, it can quickly adapt to the hardness and toughness characteristics of different rocks, achieve a smoother drilling process, reduce the frequency of stuck and stuck drilling, maintain stable drilling speed, and save overall drilling time and cost.
4. Adapt to special formations: In fractured, loose, or easily collapsed formations, ordinary drilling tools are difficult to form hole walls and may even bury rock cores. The outer casing of the single action dual tube drilling tool can serve as a temporary wall protection, creating a relatively stable core extraction space for the inner core tube, thus successfully collecting usable core under such harsh geological conditions and expanding the range of geological formations that can be drilled.
5. Obtaining high-quality samples for scientific research: For scientific research purposes, it is required that the core samples accurately reflect the true information of the strata, including the mineral composition, pore structure, and bedding characteristics of the rocks. A complete core sample can enable geologists, petroleum engineers, and other researchers to conduct high-precision testing using microscopes, chemical analysis instruments, etc., providing reliable first-hand information for resource exploration, geological hazard assessment, paleoenvironmental research, and other projects.
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