There are many types of cemented carbide drill bits with different uses. They can be summarized into two categories: one is the coring carbide drill bit, which is characterized by an annular drill bit that can take out a cylindrical core after drilling. Therefore, it is also called annular core alloy drill bit, which is the most commonly used type of drill bit for core drilling; the other type is non-coring carbide drill bit. Its characteristic is that the bottom of the drill bit is fully inlaid with alloy, and no core is required for comprehensive drilling, so it can also be called a comprehensive alloy drill bit. This is the most commonly used type of drill bit for drilling overburden and soft rock.
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