Abstract <p>The hydraulic system plays a role in drilling operations significantly impacting drilling efficiency and costs. This study extensively reviews the literature on optimizing bit hydraulics from 2012 to the present. Employing a systematic review approach, the study identifies and synthesizes key trends and findings in bit hydraulic optimization. Getting the most out of your drilling operation starts with a well-tuned system, especially when drilling through tough rocks like shale. By carefully designing and maintaining your hydraulics and paying close attention to things like nozzle size, weight applied to the drill bit, and how fast it spins, you can significantly improve your drilling speed and keep your costs down. The review addresses a primary challenge: “balling,” where cuttings accumulate on the bit face, impeding the drilling process. A well-optimized bit hydraulic design prevents balling and enhances the bottom-hole cleaning, mitigating disruptions in drilling activities. This paper contributes to a nuanced understanding of the importance of bit hydraulic optimization in drilling operations, presenting a detailed overview of relevant research papers. The inclusion of diverse perspectives and methodologies enriches the discourse surrounding hydraulic optimization. The exploration of concepts such as Bit Hydraulic Horsepower, Bit Hydraulic Optimization, Bit Impact Force, Hydraulic Optimization, and Nozzle Velocity further illuminates the multifaceted nature of bit hydraulic optimization and its broader implications for advancing the efficiency and cost-effectiveness of rotary drilling operations.</p>