Hot pressing diamond bit and manufacturing method thereof

Abstract

The invention discloses a hot pressing diamond bit and a manufacturing method thereof. The bit at least comprises a plurality of cutting units and water gaps, wherein each cutting unit comprises a supporting body and a plurality of diamond compacts dispersed into the supporting body; the concentration of diamond in the diamond compacts is between 90 and 105 percent; and 45 to 60 percent of the area of a working bottom lip of the bit is the diamond compacts. The preparation method comprises the steps of: firstly, adopting a hot pressing method or an electroplating method to prefabricate the diamond compacts; and then dispersely positioning the cylindrical diamond compacts into alloy powder taken as the supporting body in a mold, and hot-pressing and sintering into the diamond bit through amedium frequency furnace. The hot pressing diamond bit has the characteristics of good exposure, high efficiency and long service life, can effectively drill into hard to extra-hard, compact and weak-abrasiveness formations, and radically solve the problems which bother the drilling field for a long time.

Description

technical field [0001] The invention relates to a structure of a hot-pressed diamond drill bit and a preparation method thereof. The hot-pressed diamond drill bit is used for geological exploration, oil drilling and engineering survey, and simultaneously used for prevention and control of geological disasters, belonging to the field of geological engineering. Background technique [0002] In the late 1960s, my country began to develop artificial diamond drill bits. So far, hot pressing and electroplating methods are still used to manufacture diamond drill bits. Drill bits manufactured by hot pressing method have high hardness and wear resistance, and can meet the needs of drilling in most rock formations. However, there is nothing that can be done for drilling into hard, dense and weakly abrasive rock formations. The performance is that the drilling time is extremely low, generally 0.3-0.4m / h; the service life of the drill bit is short, only about 8-10m. Although the drill ...

AI Technical Summary

Problems solved by technology

However, the facts show that the soft matrix with low wear resistance cannot be adapted to drilling in this type of rock formation. The main reason is that this matrix cannot adapt to the conditions of high drilling pressure, and the plastic creep of the soft matrix cannot make the diamond edge effectively. , the diamond cannot effectively cut into the rock and cannot achieve the intended purpose of the design

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