The rheological effects of power law drilling fluids on cuttings transportation in non-vertical boreholes.

Abstract

Cuttings transportation in non-vertical boreholes is necessary for oil and gas wells. Efficient cuttings removal from a well in drilling is critical for cost-effective drilling as high annular cuttings buildup often leads to high risk of stuck pipe, reduced rate of penetration and other impediments to standard drilling and completion procedures. This study investigates how rheological parameters influence the removal of cuttings in non vertical boreholes. It contributes to work already done to ensure efficient hole cleaning process. In this study, rheological parameters were examined. Fifteen mud samples, three annular velocities and three hole angles were considered. An excel spreadsheets program was developed and used to determine the parameters and the part they play as far as removal of cuttings from non-vertical boreholes is concerned.