Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Comparing Pressure Losses on the Reverse and Direct Circulation Systems
Submission Author:
Waleska Rodrigues Pontes da Costa , PB
Co-Authors:
Waleska Rodrigues Pontes da Costa, Luciana Amorim
Presenter: Luciana Amorim
doi://10.26678/ABCM.COBEM2017.COB17-2734
Abstract
The cuttings cleaning at the bottom hole during drilling operations is performed through the flow of the drilling fluid in the circulation system, which can occur by the direct or reverse circulation methods. This work aims to study the pressure drop in the annular space, located between the well and drill string, during the cuttings transportation by the drilling fluid in the direct and reverse circulation systems, as well as calculate and analyze the equivalent circulating density. For this, two intervals were analyzed in a drilling operation of an onshore well, the first one using reverse circulation, and another, the conventional circulation system. The calculated pressure drops were smaller in the interval drilled with reverse circulation and this difference is mainly related to the lower flow rate used. These results show the possibility of using reverse circulation in wells whose geometry presents greater lengths, since the energy required for pumping the drilling fluid will be substantially lower than in the direct circulation.
Keywords
Pressure Loss, Circulating Systems, Reverse Circulation, Equivalent Circulating Density
