Diamond drill bit matrix embed material suitable for weak-abrasiveness hard formation

Abstract

The invention relates to a matrix material applicable to a weak-abrasiveness hard formation bit, which is prepared by that, mixing 20-30 percent of casting tungsten carbide finer than 200 meshes, 20-30 percent of tungsten carbide finer than 800 meshes, 10-20 percent of tungsten powder of 80-200 meshes, 20-25 percent of copper powder finer than 400 meshes, 10-15 percent of nickel powder finer than 800 meshes, 5-10 percent of manganese powder finer than 800 meshes, 2-5 percent of zinc powder finer than 400 meshes and 2-5 percent of cobalt powder finer than 400 meshes, and pressing the mixture with diamond particles at 1050 DEG C and 2KN of pressure. The diamond-impregnated bit made by the matrix material provided by the invention is characterized by proper wearing resistance, good erosion resistance and strong anti-impact toughness, which is suitable for the drilling of weak-abrasiveness hard formation.

Description

Technical field: [0001] The invention relates to a matrix material of an impregnated diamond drill bit. Background technique: [0002] With the development of science and technology, the role of drilling technology in various fields of energy exploration, engineering drilling, marine drilling, polar drilling and scientific drilling is becoming more and more extensive. The drilling depth is getting deeper and deeper, and extremely hard formations are encountered during the drilling process. There are more and more chances. When the traditional drilling tool roller cone bit drills through the formation, the drill bit teeth will be broken due to the extremely high hardness of the formation, and the purpose of drilling into the rock cannot be achieved; the PDC drill bit uses the scraping method. Broken rock, the cutting teeth of the drill bit cannot effectively penetrate into the hard formation and cannot adapt to the drilling of the hard formation; although the impregnated diam...

AI Technical Summary

Problems solved by technology

[0002] With the development of science and technology, the role of drilling technology in various fields of energy exploration, engineering drilling, marine drilling, polar drilling and scientific drilling is becoming more and more extensive. The drilling depth is getting deeper and deeper, and extremely hard formations are encountered during the drilling process. There are more and more chances. When the traditional drilling tool roller cone bit drills through the formation, the drill bit teeth will be broken due to the extremely high hardness of the formation, and the purpose of drilling into the rock cannot be achieved; the PDC drill bit uses the scraping method. Broken rock, the cutting teeth of the drill bit cannot effectively penetrate into the hard formation and cannot adapt to the drilling of the hard formation; although the impregnated diamond bit can undertake the drilling work of the hard formation, there are also many problems as follows

When drilling into dense and low-abrasive hard formations such as hard limestone, high-strength dolomite, and carbonate rocks containing chert concretions, the impregnated diamond bit often slips and the footage is extremely slow or even non-existent. The speed is often around 0.1-0.2m / h, and it takes a lot of time and drill bits to drill; the reason is that the diamonds are quickly blunted in a short drilling time and cannot effectively cut rocks, and the matrix is ​​less in rock. In the case of cuttings or no cuttings, the diamond cannot be worn out in time to expose the diamond, resulting in low efficiency and high cost of the current impregnated diamond bit for drilling into weakly abrasive hard formations