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Keywords: slug flow
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Proceedings Papers

Publisher: BHR Group
Paper presented at the 11th North American Conference on Multiphase Production Technology, June 6–8, 2018
Paper Number: BHR-2018-057
... ABSTRACT Gas liquid slug flow can induce vibrations in process piping and large scale slugging can cause some oscillations of subsea flexible pipes. Pipe movements should be avoided, as fatigue can lead to pipe failure. Flow transients can also cause pipe failure, water slugs have lifted...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 11th North American Conference on Multiphase Production Technology, June 6–8, 2018
Paper Number: BHR-2018-125
..., induction time, hydrate structure, conversion rate, hydrate distributions (either in the flowing liquid or adhering at the top of the line), and pressure drop evolutions. The influence of the flow regimes is presented for the AA-2 additive. Tests were run in stratified flow (low flow rate), slug flow...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 11th North American Conference on Multiphase Production Technology, June 6–8, 2018
Paper Number: BHR-2018-203
... ABSTRACT This study investigates experimentally and theoretically the existence slugs for vertical co-current two-phase flow in large diameter vertical tubing and risers. The slug flow pattern implies the presence of Taylor bubbles separated by hydraulically sealed liquid slugs. Previous...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 11th North American Conference on Multiphase Production Technology, June 6–8, 2018
Paper Number: BHR-2018-229
... 1. INTRODUCTION Intermittent flow, especially the slug flow regime, occurs very frequently in the transport of hydrocarbon fluids in pipelines in the oil and gas industry. The slug flow regime is usually undesirable since the intermittency of slugs causes severe adverse conditions. Firstly, the flow...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 11th North American Conference on Multiphase Production Technology, June 6–8, 2018
Paper Number: BHR-2018-461
...Pseudo slug flow in viscous oil systems experiments and modelling with LedaFlow J Kjølaas, I E Smith, C Brekken SINTEF, Norway ABSTRACT An experimental two-phase flow campaign with a viscous oil (100 cP) was conducted in the Large Scale 8" loop at the SINTEF Multiphase Flow Laboratory. The loop...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 11th North American Conference on Multiphase Production Technology, June 6–8, 2018
Paper Number: BHR-2018-477
...Experimental and modelling study of the wall shear stress profile in horizontal pipes for highly viscous two-phase slug flow T Kim, E Pereyra, C Sarica The University of Tulsa, McDougall School of Petroleum Engineering, USA ABSTRACT A set of air and highly viscous oil experiments was conducted...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 10th North American Conference on Multiphase Technology, June 8–10, 2016
Paper Number: BHR-2016-245
... have several bends and changes in the internal bore diameters that significantly affect the fluid flow profile. Consequently, localized turbulence and slug flow are common problems encountered during operation. This study investigates the vibration of a complex M shaped jumper system in slug flow...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 10th North American Conference on Multiphase Technology, June 8–10, 2016
Paper Number: BHR-2016-421
... pipelines. Effect of flow development length: Many models/correlations neglect the effect of flow development length on slug frequencies. The experimental study has revealed that this is an important parameter. Introduction Slug flow is a very common flow pattern in pipelines and wellbores...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 9th North American Conference on Multiphase Technology, June 11–13, 2014
Paper Number: BHR-2014-B3
... Multiphase 9 115 papers Gokcal investigated the effects of high viscosity oils on flow pattern, pressure drop and liquid holdup. The focus in his last referred paper was on the effects of high oil viscosity on slug flow characteristics. Pressure gradients were measured by dP- transducers, while slug lengths...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 9th North American Conference on Multiphase Technology, June 11–13, 2014
Paper Number: BHR-2014-D5
.... intermittency force balance production monitoring slip node separated flow production logging upstream oil & gas representation bhr group 2014 mass balance flow pattern gas core pipe segment area fraction artificial intelligence node 2 equation slug flow fraction reservoir surveillance...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 9th North American Conference on Multiphase Technology, June 11–13, 2014
Paper Number: BHR-2014-G3
...Modeling slug flow in looped pipelines L Liu 1, S L Scott 2, V Ponagandla 1, G E Kouba 3 1 INTECSEA, USA 2 Texas A&M University (now at Shell UAD), USA 3 Chevron ETC, USA 1 ABSTRACT Looped pipelines are evaluated as a method of reducing outlet flow rate fluctuations in multiphase pipelines operated...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 9th North American Conference on Multiphase Technology, June 11–13, 2014
Paper Number: BHR-2014-G4
...Experimental study to characterize slug flow for medium oil viscosities in horizontal pipes R Brito, E Pereyra, C Sarica The University of Tulsa, Fluid Flow Projects, USA 1 INTRODUCTION Gas-liquid two-phase flow in pipes is a common occurrence in the petroleum industry production and transportation...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 9th North American Conference on Multiphase Technology, June 11–13, 2014
Paper Number: BHR-2014-G5
... such as slugging. In this paper we will describe experiments from this facility and apply those to validate the associated predictions of the LedaFlow multiphase simulator. © BHR Group 2014 Multiphase 9 419 Models for slugging flows have historically been based the classical unit cell model (15) or the more...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 8th North American Conference on Multiphase Technology, June 20–22, 2012
Paper Number: BHR-2012-A005
... which part of the slug unit cell contributes most to the drag reduction, and also whether the pressure drop reduction can be ascribed to frictional (i.e. drag) or gravitational effects. It was reported that DRA sometimes induced a transition from slug flow to wavy stratified flow. Rodriguez Ochoa...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 8th North American Conference on Multiphase Technology, June 20–22, 2012
Paper Number: BHR-2012-A006
... Pressure drop in laminar slug flow with heavy oil J Nossen, C J Lawrence Institute for Energy Technology and FACE, Norway ABSTRACT The pressure drop in slug flow of heavy oil and gas in a pipe in the laminar regime is studied. A simple mechanistic model with closure laws from the literature...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 8th North American Conference on Multiphase Technology, June 20–22, 2012
Paper Number: BHR-2012-A017
... surface, combined with the Very-Large Eddy Simulation (VLES) approach to cope with turbulence. We will first discuss new results of transition from stratified to slug flow, which agree well with the data as to water hold-up and slug frequency. We will then present new results of bubbly and slug flow...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 8th North American Conference on Multiphase Technology, June 20–22, 2012
Paper Number: BHR-2012-A022
... ABSTRACT: Hydrodynamic slug flow is the prevailing flow regime in oil production, yet industry still lacks a comprehensive model, based on first principles, which fully describes hydrodynamic slug flow. This paper describes a very simple, time-dependent, two-phase (gas-liquid) model which...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 8th North American Conference on Multiphase Technology, June 20–22, 2012
Paper Number: BHR-2012-A024
... ABSTRACT: Slug frequency is a critical characteristic of two-phase slug flow for predicting pressure gradient, erosion/corrosion rates, pipeline structural integrity and designing downstream separation and process facilities. Conversely, slug frequency is the least accurately predicted...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 7th North American Conference on Multiphase Technology, June 2–4, 2010
Paper Number: BHR-2010-B1
... length becomes less sensitive to the change in slug frequency at low flow rates. INTRODUCTION A slug flow pattern is commonly observed when transporting gas and liquid in horizontal pipes. Slug flow is characterized by plugs of liquid moving downstream separated by elongated bubbles moving along the top...

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