Abstract

In drilling hydraulic calculations, the pressure drop modelling plays an important role. The exact modelling can increase the rate of penetration and reduce the drilling costs, and conversely, miscalculations may cause potentially problems such as fluid loss, well damage. This paper presents the modelling of pressure drop for the vertical drilling well and the directional drilling well in three different procedures. There are the in-field procedure and two procedures from the petroleum software’s Hydmod and Drilling Office. These obtained results are compared and analysed to show the confidence and potential of these commercial software applied in petroleum industry.