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In western Canada, rule-based expert systems for bit selection and mechanical drilling rate prediction algorithms have recently been used to optimize the drilling of vertical wells up to 4500 meters deep in foothill areas. Post-drilling analysis showed that when following the recommendations of this expert system, the mechanical drilling rate increased for each well section, confirming the accuracy of the lithology/pore pressure prediction and mechanical drilling rate prediction algorithms. This expert system is a rule-based drill bit selection system that, using detailed descriptions of the drilling environment—including lithology data per meter, synthetic cable logging, predicted pore pressure, and predicted operational parameters for the well or well section—provides recommendations for drill bit types and characteristics. The mechanical drilling rate algorithm has evolved into a drilling optimization tool that attempts to simulate the technical constraints of a specified well section. The input data for the drilling rate algorithm include a detailed description of the formation’s lithology, borehole dimensions, drilling fluid density, predicted pore pressure, bit type, and anticipated drilling parameters. This expert system and mechanical drilling rate algorithm provide a means to optimize drilling operations in this region. Drilling operations in a 4500m vertical well yielded significant results: in the 311.2mm section, the mechanical drilling rate increased by 15% ； In the 215.9 mm section, the mechanical drilling speed increased by 52% ； In the 142.9 mm section, the mechanical drilling rate increased by 60% ； TCI drill bits extend drill bit life by 33%, saving 15 days in total well drilling time. This expert system and mechanical drilling rate algorithm will be used in future drilling optimization projects; the simulation process is being improved to avoid misguidance and exclude low-quality logging data.