Diamond drill bit matrix and manufacturing method thereof

Abstract

The invention discloses a diamond drill bit matrix. Manufacturing raw materials of the diamond drill bit matrix include cast tungsten carbide powder, nickel powder, spherical tungsten carbide powder,macrocrystalline tungsten carbide powder, tin bronze powder and a solid lubricant. The diamond drill bit matrix comprises, by weight, 15-25 parts of the cast tungsten carbide powder, 20-35 parts of the nickel powder, 20-25 parts of the spherical tungsten carbide powder, 5-15 parts of the macrocrystalline tungsten carbide powder, 10-15 parts of the tin bronze powder and a proper quantity of the solid lubricant. According to the diamond drill bit matrix, the solid lubricant is added into the manufacturing materials, the friction coefficient between cutting teeth and processed materials in the running process of the cutting teeth can be reduced through the solid lubricant, the service life of the cutting teeth is prolonged and processing efficiency is improved. Meanwhile, diamond particles can be distributed in the cutting teeth more uniformly through a pelletizing technology, and the added manufacturing raw materials can be obtained easily. Moreover, the service life of a diamond drill bit can be prolonged to a certain extent by changing the coefficient of production, and mass production can be conducted.

Description

technical field [0001] The invention relates to the field of diamond technology, in particular to a diamond bit matrix and a manufacturing method thereof. Background technique [0002] The drill that makes the cutting edge is called a diamond drill. The drill bit is a one-piece drill bit. The whole drill bit has no moving parts and has a relatively simple structure. It has high strength, high wear resistance and impact resistance. It is one of the three new technologies of drilling in the world in the 1980s. Field use proves that when drilling in soft-medium hard formations, diamond bits have the advantages of fast speed, more footage, long life, stable work, fewer downhole accidents, and good wellbore quality. The diamond drill bit not only has a long service life, but also can be reused. The diamond drill bit returned to the factory for repair has the same effect as the factory diamond drill bit, which can save a lot of drilling costs. [0003] Since the diamond wear rat...

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Problems solved by technology

[0003] Since the diamond wear rate is seriously affected by its working temperature (the temperature rises from 300°C to 500°C, the wear rate of diamond increases by 3 times, and then wears faster), and the static bottom hole temperature of some deep wells and ultra-deep wells can be As high as 200°C and above, it will greatly affect the service life and drilling efficiency of the impregnated diamond drill bit. Therefore, we propose a diamond drill bit and its manufacturing method