Diamond bit and manufacturing method thereof

A diamond drill bit and a manufacturing method technology, applied in the direction of drill bits, drilling equipment, earthwork drilling, etc., can solve problems such as single performance and structure of the working layer, affect the geological drilling process, increase drilling cost, etc., and achieve long service life and good cutting edge , high efficiency effect

Inactive Publication Date: 2010-06-23
龚宏伟
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  • Abstract
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  • Application Information

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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

Method used

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  • Diamond bit and manufacturing method thereof
  • Diamond bit and manufacturing method thereof
  • Diamond bit and manufacturing method thereof

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Embodiment

[0023] The hot-pressed diamond drill bit provided by the present invention includes a PCD sintered body 1 of the drill bit, a working layer matrix 2 and a nozzle nozzle 3 of the drill bit. Several PCD sintered bodies 1 are dispersed in the working layer carcass 2 . The diamond concentration in the diamond composite body is 95% to 100%, and the PCD sintered body 1 accounts for 55% to 70% of the working lip area of ​​the drill bit; the hardness of the PCD sintered body 1 is HRc38 to 42, and the wear resistance is 0.35 to 0.45× 10-5ML. The material of the working layer matrix 2 of the drill bit is iron-nickel-manganese-cobalt-bronze alloy, in which iron accounts for 48% to 50%, nickel accounts for 12% to 16%, manganese accounts for 4% to 5%, and copper alloy accounts for 32% to 35%. %, its hardness is HRc22~HRc26, wear resistance is 0.48~0.55×10-5ML, the hardness of the drill matrix is ​​low, and the wear resistance is low; the main function is to firmly wrap the PCD sintered bo...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/46
Inventor 龚宏伟李银梅
Owner 龚宏伟
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