Working principle of drilling tools

Drilling tools mainly include drill bit, drill string, driving device and other components. The process of drilling can be divided into two ways: impact drilling and circulating drilling. In percussion drilling, the drill bit shatters the underground rock formation by constantly percussion and rotation, while in circulation drilling, the drill bit is driven to rotate by pumping drilling fluid, while percussion cuttings and cooling the drill bit.
Drilling fluid plays a vital role in drilling. It can not only cool and lubricate the drill bit, reduce frictional resistance, but also transport the cuttings to the ground, while preventing the collapse of the well wall. The nature and circulation of drilling fluid is an important guarantee for the normal operation of drilling tools.
When drilling tools drill underground, the characteristics of the formation should be considered, and the appropriate drill bit and drill pipe should be selected to ensure the smooth drilling operation. For different geological conditions and borehole forms, the working principle and selection of drilling tools are also different. For example, in soft rock formations, it is more appropriate to use drill bit cutting methods for drilling, while in hard rock geology, it is necessary to consider the use of strong crushing methods.
To sum up, the working principle of drilling tools involves many aspects of knowledge. Only by fully understanding and applying these principles can the effective operation of drilling tools be ensured and the exploitation and utilization of underground resources be realized.