Impregnated diamond bit matrix material with high wear resistance and method for manufacturing diamond bit by using same

Abstract

The invention provides an impregnated diamond bit matrix material with high wear resistance and a method for manufacturing a diamond bit by using the same. The matrix material comprises the followingcomponents of, by weight, 42%-56% of FAM-1020(Fe80Ni18Co2), 16%-22% of FAM-3010(Fe81Ni7Mn12), 28%-36% of FAM-2120(Fe85Ni6Cu6Sn3) and inevitable impurities. The manufacturing method comprises the following steps of heating the matrix material; carrying out low-pressure sintering treatment on the matrix material; cooling the matrix material to room temperature; carrying out hot isostatic pressing treatment on an impregnated diamond bit blank; and cooling to room temperature. By reasonably designing the components of the impregnated diamond bit matrix material and adopting the special low-pressure sintering heating isostatic pressing manufacturing method matched with the components, the wear resistance and the comprehensive mechanical property of the impregnated diamond bit matrix are effectively improved, and the drilling target with high efficiency and long service life can be achieved.

Description

technical field [0001] The invention belongs to the technical field of geological exploration and drilling engineering, and specifically refers to a high wear resistance impregnated diamond bit matrix material and a method for manufacturing a diamond bit using the same. Background technique [0002] With the rapid development of geological exploration, shale gas new energy exploration and geothermal exploration, as well as the rapid development of deep drilling and deep geoscience research, the grades of rocks encountered vary greatly and the lithology is complex. High-performance diamond drill bits are required to adapt to this rapid development. In particular, the hardness of the deep rock formation is high, the abrasiveness is strong, the drill bit wears out quickly, the service life of the drill bit is short, the frequency of changing the drill bit is high, and the frequency of drilling is significantly increased, resulting in high drilling construction costs. The perfor...

AI Technical Summary

Problems solved by technology

However, the physical and mechanical properties of traditional carcass materials are very different. The hardest and highest melting point are skeleton materials (WC, YG8), and the softest and lowest melting point are Cu-Sn and Cu-Sn-Zn alloy materials. ;Metal materials with very different physical and mechanical properties form the carcass material system. Under the traditional hot-pressing process parameters, it is difficult to achieve the desired carcass performance, and the hot-pressing process parameters are difficult to reasonably design and optimize.

When the temperature and pressure are high, it is beneficial to the sintering of the skeleton materials WC, YG8 and metals such as Fe, Ni, Mn, Co, etc., but it is unfavorable to the sintering of the Cu alloy. The melting point of the Cu alloy is low, and the loss after melting increases. Changes; when using lower temperature and pressure sintering, although it is beneficial to Cu alloy hot pressing sintering, it is difficult to meet the overall mechanical performance requirements of the matrix, and the hardness and wear resistance of the drill bit are difficult to meet the requirements

Therefore, it is very difficult to design hot-pressing process parameters for the matrix material of the traditional diamond-impregnated drill bit, and it is even more difficult to optimize the design, and it is difficult to stabilize and control the quality of the drill bit.

It is difficult to manufacture diamond-impregnated drill bits with universal performance, and the use range of drill bits is limited

[0005] The electroplating method to manufacture impregnated diamond drill bits is an original creation in my country, but its production cycle is long, generally 8 to 10 days as a cycle; pinholes are inevitably formed in the bit matrix, which greatly reduces the compactness and wear resistance of the bit performance; at the same time, the gauge effect of the electroplated impregnated diamond bit is not ideal

Therefore, it is not suitable for deep drilling and wireline core drilling, and the scope of application is limited

The brazing method to manufacture diamond bits is sometimes used to manufacture surface-set diamond bits, and the biggest disadvantage of the impregnated diamond bits is that it is difficult for the diamond to come out during drilling, and the drilling efficiency is low; at the same time, the manufactured diamond bits are not standardized and have low precision. These deficiencies have not been effectively improved and broken through so far, and cannot be popularized and applied.

[0006] From the above analysis, it can be seen that the manufacturing methods of the above-mentioned several common diamond-impregnated drill bits have their own advantages, but all have obvious deficiencies. The process parameters and the current status of the drill matrix material have become the key to restrict the performance and quality of the impregnated diamond drill bit. , has become a bottleneck restricting the high-efficiency and long-life drilling of impregnated diamond bits