FALCULTY OF ENGINEERING

Efficient cuttings transport and hole cleaning is very important for obtaining an effective drilling operation. In inclined and horizontal drilling, hole cleaning issues is a common and complex problem. This project explains the impact of various drilling parameters and how they affect the required flow velocity and flow rate required for effective cuttings transport, cuttings transport is controlled by many variables such as well inclination angle, hole and drill-pipe diameter, rotation speed of drill pipe (RPM), drill-pipe eccentricity, rate of penetration (ROP), cuttings characteristics like cuttings size and porosity of bed and drilling fluids characteristics like flow rate, fluid velocity, flow regime, mud type and non - Newtonian mud rheology.
The following existing models were used which includes Larsen, Rubiandini, Moore, Hopkin, zeidler model, analysis was made on them based on the same parameters and prediction was obtained from the analysis, parameters used included ROP, mud weight, cutting size and mud rheology
The analysis shows that the larsens model gave the best slip velocity for lifting cuttings and effective hole cleaning.
The larsens model was therefore improved to get better results.