Diamond composite drill bits are known for their simple structure, high strength, excellent wear resistance, and strong impact resistance. As a result, they have become widely used in domestic oil exploration, geological surveys, and coal mining drilling operations. Harbin Haimingrun Superhard Materials Co., Ltd. is currently conducting research on key technologies such as ultra-high pressure and high-temperature sintering, surface modification, and external tooth design of polycrystalline diamond compacts. These efforts aim to enhance production efficiency and extend the service life of the products by over 50%.
With support from the Harbin Science and Technology Bureau, Harbin Haimingrun collaborated with the School of Materials Science and Chemical Engineering at Harbin Engineering University to conduct technical exchanges and overcome critical challenges. In the course of innovation, the company redesigned the edge structure of the diamond composite sheet into a multi-step configuration, which reduced residual thermal stress at the edge by more than three times, significantly enhancing the product's impact resistance.
In addition, the company replaced catalytic metals in the polycrystalline diamond layer with non-catalytic, high-thermal-conductivity metals. This improvement enhanced the thermal conductivity of the working surface of the polycrystalline diamond, lowered the operating temperature, and extended the service life of the component. Furthermore, the external tooth profile of the diamond composite was redesigned, transforming the end face of the polycrystalline diamond into a tooth-like structure. This change greatly improved the rock-breaking efficiency of the drill bit, resulting in a significant increase in drilling speed.
These technological advancements not only improve the performance and durability of diamond composite drill bits but also contribute to greater efficiency and cost-effectiveness in various drilling applications.
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