Do the cutting edge of the drill bit is called the diamond bit. The drill bit is a one bit, the bit no active components, has the advantages of simple structure, high strength, high wear resistance and impact resistance capacity. The field test shows that, diamond bit in soft - hard formation during drilling, a faster, more footage, long service life, stable work, small, well downhole accidents the quality of the advantages of good. Diamond drill bit is not only used for a long time, but also can be reused.