Introduction to the advantages of PDC core bit
With the continuous development of science and technology, every company will choose products with good wear resistance, for example, the drill bit for cutting edge is called PDC core bit. The drill bit is an integrated drill bit, the whole drill bit has no moving parts, the structure is relatively simple, and it has high strength, high wear resistance and impact resistance. It is one of the three new drilling technologies in the world in the 1980s. Field use proves that when drilling in soft-medium-hard formations, the diamond bit has the advantages of high speed, large footage, long life, stable work, fewer downhole accidents, and good well quality. Diamond drill bits are not only used for a long time, but can also be reused. The use effect of the returned diamond drill bit is similar to the factory diamond bit, which can save a lot of drilling costs.
The rock breaking effect of PDC core bit is completed by diamond particles. To know the rock breaking effect of the drill bit, it is necessary to understand the rock breaking effect of single diamond. In hard stratum, single diamond particles put the rock under high stress state (about 4200-5700MPa, some data prove that it can reach 6300MPa) under the action of weight-on-bit, causing the rock to undergo lithological transformation from brittleness to plasticity. Single diamonds penetrate into the formation and cut and break the rock under the action of torque. The cutting depth is basically equal to the penetration depth of diamond particles. This process is like "ploughing the ground" so it is called the plough cutting action of the diamond bit.