Small-scale experiments on stabilizing riser slug flow

Experimental study on severe slugging mitigation by applying wavy pipes

“…The active methods mainly include three types: topside choking at the riser top, external gas-lifting and control-based methods. The riser top choking method needs operators to adjust the opening of the choking valve manually (Schmidt et al, 1985;Taitel, 1986); the external-gas lifting needs compressors to compress the external gas and separate pipelines to transport the compressed gas to the designed injection places (Jansen et al, 1996); the control-based methods need controllers to adjust an actuator such as a valve to deal with different flow and operating conditions (Havre and Dalsmo, 2002;Storkaas, 2005;Sivertsen et al, 2010). The passive slug mitigation methods usually take the form of design changes to the facility itself such as sizing of slug catcher, gas lifting by rerouting the gas in the pipeline to the riser (Sarica and Tengesdal, 2000) and flow regime modification by a flow conditioner in the pipeline (Almeida and Gonçalves, 1999;Makogan and Brook, 2007).…”

A New Discrete Slug-Flow Controller for Production Pipeline Risers

“…Di Meglio et al (2009Meglio et al ( , 2010, Ogazi et al (2009Ogazi et al ( , 2010, Sivertsen et al (2009)).…”

Recreating Riser Slugging Flow Based on an Economic Lab-sized Setup

“…Some can be caused by the physical appearance in both horizontal and vertical pipelines, and some due to transient response related to pigging, start-up, blow-down, and changes in the pressures or flow rates, (Sivertsen et al (2010)). The flow maps are only showing the steady-state operation.…”