Characteristics of Bubbly Flows in Perforated Pipe

摘要

The local two-phase gas/liquid flow behavior at a high velocity gradient is essential for managing gassy wells. In this study, the methane/water bubbly flows passing through a perforated pipe were characterized in a 10.4-m flow loop in which the pressure was varied up to 5.5 MPa at 291 K. To characterize the two-phase flow behavior at the bore, we obtained the bubble sizes from high-speed photographs and digital image analysis. As the flow velocity and/or pressure increased, the flow patterns shifted from bubbling to jetting, suggesting that the local two-phase flow pattern can control the bubble size in flowlines.