To address the problems of easily broken cuttings, severe cuttings bed accumulation, and non-linear increase in friction caused by high clay content in horizontal well drilling of Jurassic continental shale oil in Block J of the Sichuan Basin, this study reduces the formation rate of cuttings bed through optimization of drilling parameters, and at the same time uses sand cleaning joints to remove deposited cuttings, forming a "prevention-removal" closed loop. The goal is to control the thickness of the cuttings bed within 5% of the well diameter, so as to solve the problem of cuttings bed in long horizontal sections that is difficult to be handled by a single technology. In this paper, the key drilling parameters ensuring a low formation of cuttings bed are simulated and optimized, and the optimal combination of drilling parameters and the primary and secondary relationships of influencing factors are determined through orthogonal simulation analysis. By introducing a horizontal section correction factor, the Moore cuttings slip velocity model was modified, and the optimal spacing for cuttings removal tools was quantified. Field applications demonstrated a 50% reduction in sliding friction, a 25% decrease in rotational torque, and a 40% shortening of the drilling cycle in Well J110-8-1H. This technology provides theoretical and practical guidance for safe and efficient drilling in continental high-clay formations.