Study on cuttings removal effect of Effective HydroClean Drill Pipe under different deviation conditions of drill pipe

Abstract

In order to solve the problem of cuttings bed in the drilling process of highly deviated sections in directional wells, horizontal wells and extended reach wells, an Effective HydroClean Drill Pipe(EHCDP) was designed, using computational fluid dynamics (CFD) simulation techniques, the flow characteristics of the annular flow field under the action of EHCDP were analyzed, the cuttings removal efficiency of this kind of EHCDP under different deviation conditions is studied, thus providing the relevant basis for using this EHCDP to remove cuttings more efficiently. The results show that the EHCDP can effectively remove cuttings under different deviation conditions. However, the larger the inclination angle of the well, the more likely the cuttings is to accumulate on the lower edge of the wellbore due to gravity, forming cuttings bed. In highly inclined wellbore above 60°, EHCDP can be combined with traditional cuttings removal methods to more effectively remove cuttings near the low side of the wellbore.