Drill pipe is a type of drilling accessory that cuts rocks into cores or grinds them into powder by diamond, which plays a major role in steamer drilling. It is mainly used in geological core exploration, hydrogeological exploration, mineral core drilling and coal resource exploration.
　　1. In geological core exploration, the main function of the diamond bit is to judge the general situation of the area by observing the appearance of the core taken out, so as to determine whether the area is suitable for planning and construction.
 
　　2. In hydrogeological exploration, the main function of the diamond bit is to judge the water content in the formation through the drilling of the bit, and whether it can provide suitable water for the well.
　　3. In mineral core drilling, the core extracted by the diamond bit is studied and analyzed to determine the mineral content. Through a large number of core analysis, the data is unified to analyze the distribution and content of minerals in the entire drilling area.
　　4. In coal resource drilling,  Tapered Bit is mainly used to determine the depth and distribution area of ​​coal resources, so as to determine the amount of coal.
　　Of course, there are some non-coring drill bits, which are mainly used for drilling. The existence of diamond can improve its wear resistance.