Chengwen Liu1,*, Lin Zhu1, Xingru Wu2,*, Jian Liang1, Zhaomin Li1
CMES-Computer Modeling in Engineering & Sciences, Vol.124, No.2, pp. 561-572, 2020, DOI:10.32604/cmes.2020.010699
Abstract In drilling a deepwater well, the mud density window is narrow, which
needs a precise pressure control to drill the well to its designed depth. Therefore,
an accurate characterization of annular flow between the drilling riser and drilling
string is critical in well control and drilling safety. Many other factors influencing
the change of drilling pressure that should be but have not been studied suffi-
ciently. We used numerical method to simulate the process of drill string rotation
and vibration in the riser to show that the rotation and transverse vibration of drill
string can increase the axial velocity in… More >
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