Diamond bit and manufacturing method thereof

Abstract

The invention relates to a diamond bit and a manufacturing method thereof. The diamond bit comprises a work layer of an ordinary diamond bit and PCD sintered bodies which are distributed in the work layer, the PCD sintered bodies are columnar bodies, cuboids or cylinders and are distributed and arranged in a work layer matrix of the diamond bit, and the PCD sintered bodies account for 55-70 percent of the area of a work bottom lip of the diamond bit. The manufacturing method comprises the following steps: columnar PCD sintered bodies are precast by a hot press method; the diamond bit adopts secondary molding, the PCD sintered bodies are positioned in matrix alloy powder of the diamond bit in a graphite mould, and then the diamond bit is sintered by hot-pressing in a medium frequency electric furnace. The problem of difficult selection of the diamond bit aiming at rock stratum is solved. The diamond bit has the characteristics of good broad spectrum, good exposure, high efficiency and long service life. The diamond bit can be widely applied to geologic exploration, petroleum drilling, engineering investigation and geologic disaster control.

Description

technical field [0001] The invention relates to a broad-spectrum diamond drill bit for geological exploration, oil drilling, engineering survey 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, th...

AI Technical Summary

Problems solved by technology

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 properties of rock formations are becoming more and more complex. In a drilling hole, even if one drilling cycle is not completed, the lithology will change, and it is necessary to frequently replace drill bits with different performances. It seriously affects the process of geological drilling and increases the cost of drilling. This situation needs to be changed urgently

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