China's impregnated diamond drill bit has a new record

Abstract A significant breakthrough has recently been achieved at the Yuanlu 30 well in northeastern Sichuan. The impregnated diamond drill bit, developed by the Shengli Oilfield Drilling Institute, was successfully deployed and set a new regional record of 158.56 meters for a single drill bit. This innovative tool was specifically designed to address the challenges posed by the poor drillability of the rock formations in the area, as well as the limitations of traditional roller cone bits, such as slow drilling speed and frequent bit wear. Unlike conventional diamond-inlaid bits, the impregnated diamond drill bit features a working layer made of diamond particles embedded within a matrix material. Instead of having sharp cutting edges, the drill bit's teeth are seamlessly integrated into the carcass, allowing the bit to function more like a grinding wheel. This design enables high-speed rotation to effectively break down the rock through friction and abrasion, significantly improving efficiency. The impregnated diamond drill bit was first used at the Yuanlu 30 well on March 30. By April 7, it had drilled from 3,818.5 meters to 3,977.06 meters, achieving a footage of 158.56 meters in just 130 hours of pure drilling time, with an average rate of 1.22 meters per hour. Before this technology was applied, two roller cone bits were used over a total depth of 120.5 meters, taking 183 hours and achieving an average mechanical drilling speed of only 0.66 meters per hour. Compared to the previous method, the new impregnated diamond drill bit improved footage by 163.17% and increased the mechanical drilling speed by 84.85%. This achievement not only sets a new benchmark for single-bit performance in the region but also addresses long-standing issues of low bit efficiency and slow drilling progress in northeastern Sichuan. The successful application of this advanced tool marks a major step forward in overcoming challenging geological conditions, offering a reliable and efficient solution for future drilling operations in similar environments. It represents a powerful new "tool" in the industry’s ongoing efforts to enhance productivity and reduce operational costs.

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