Diamond drill bit and manufacturing method thereof

Abstract

The invention relates to a diamond drill bit and a manufacturing method thereof. The diamond drill bit comprises a working layer of a common diamond drill bit and a sintering body distributed on the working layer. The sintering body is a thermo-stabile polycrystal and comprises square columnar and cylindrical thermo-stabile polycrystals, wherein the square columnar thermo-stabile polycrystals are distributed and arranged on inner and external diameter parts of the working layer of the drill bit, and the cylindrical thermo-stabile polycrystals are distributed and arranged on the part of the working layer of the drill bit close to the center. The manufacturing method for the diamond drill bit comprises that the diamond drill bit is formed by hot pressing and sintering in a medium frequency furnace, wherein the temperature in the sintering process is 985 DEG C, the pressure is 18MPa, the heat preservation time is 6 minutes and the discharge temperature is 800 DEG C. The difficult problem of good drilling effect in a sandy pebble stratum and a hard-crisp-broken rock stratum is solved. The diamond drill bit has the characteristics of high hardness, strong abrasion resistance and long service life, and can be widely applied to geological exploration, petroleum drilling, engineering exploration and governance of geological disasters.

Description

technical field [0001] The invention relates to a diamond drill bit used in geological exploration, oil drilling, engineering investigation and geological disaster control and a manufacturing method thereof. Background technique [0002] From the beginning of the development of artificial diamond drill bits in my country, hot pressing and electroplating methods are mainly used to manufacture diamond drill bits. Compared with electroplated diamond drill bits, diamond drill bits manufactured by hot pressing method have higher hardness and wear resistance, and have certain adaptability. However, due to the diversity of formations, different formations are required to have corresponding performance drill bits to adapt to achieve good drilling results. In addition, the performance and structure of the working layer of ordinary diamond drill bits are single, and the broad spectrum of the drill bit is poor. With the development of geological prospecting to the deep strata, the pr...

AI Technical Summary

Problems solved by technology

However, it has poor adaptability to drilling pebble gravel formations and hard-brittle-crushed rock formations, the drilling speed is not high, and the life of the drill bit is not long.

With the development of geological prospecting to the deep strata, the rock formations are getting harder and more complex, and the probability of strong abrasive rock formations is getting higher and higher. Almost all metal ore drilling will encounter such rock formations. Serious It greatly affects the process of geological exploration and increases the cost of drilling

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