Abstract
Increasing the cuttings transport efficiency in deviated wells is difficult due to the rolling transport and cuttings settling on the low side of the annulus. Advancing flow rates and improving mud properties may not be applicable for proper hole cleaning because of the hydraulic and mechanical limitations. Under these situations, the major contribution to cuttings transport is provided by drill-pipe rotation for different eccentricities. This project describes the relationship between hole eccentricity and rotation during cuttings transport through annular bends. The present study focused on developing a computational fluid dynamics model by using Ansys fluent 2021 R1 to predict these parameters conveniently. Two phases were considered: liquid (water) and cuttings (sulfur solid), the Eulerian multiphase flow model was used in Fluent for the present study. The inlet boundary conditions specified the inlet velocities and volume fraction of involved phases. The stationary surfaces of the flow channels were hydrodynamically considered smooth walls and the outlets were regarded as being open to the atmosphere. The pressure gradient is used as the primary output parameter to analyze the flow. The simulated pressure losses are found to be logical at different conditions, thus showing the characteristics of the flow.
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