Transporte de sólidos en mezclas de biopolímeros en solución y mejoras en la distribución de sólidos de un sistema experimental de simulación de flujo en conductos verticales de sección anular

Translated title of the contribution: Transport of solids in solutions of biopolymer mixtures and improvements to their distribution in a flow simulator in vertical conduits with annular cross section

Mario Rojas, Oswaldo Andará, Alejandro Müller, Silvia Siquier, Nelson Ramírez, Eduardo Sáez

Research output: Contribution to journalArticle

Abstract

This paper compares the results on suspension and transport of solids in two experimental flow simulators in vertical ducts with annular cross section. In both cases, non-Newtonian biopolymer solutions were used as the liquid phase. The biopolymers used were xanthan gum and guar gum, and the solid phase was silica sand with an average particle size of 250 μm. The first experimental system used was based on a 3-m height concentric pipe with a 0.15 m hydraulic diameter. The second equipment was built by changing the dimensions of the first system to a height of 6 m and a 0.10 m hydraulic diameter. These changes were made so that the solid phase would distribute better throughout the whole system. Both units simulate a well drilling process at room temperature and without the effect of drill bit rotation. The most important variables studied were annular velocity and polymer concentration. Significant improvements were obtained in solids transport when changing the solids distribution pattern in the system and the geometrical characteristics of the annulus. Furthermore, the xanthan-guar gum mixture solutions with a higher proportion of guar gum have a higher solids transport capacity than pure polymer solutions; there is an important synergistic effect from the point of view of the use of these polymers as viscosifying additives for drilling fluids.

Translated title of the contributionTransport of solids in solutions of biopolymer mixtures and improvements to their distribution in a flow simulator in vertical conduits with annular cross section
Original languageSpanish
Pages (from-to)43-51
Number of pages9
JournalRevista de la Facultad de Ingenieria
Volume23
Issue number3
StatePublished - Sep 1 2008

Keywords

  • Guar gum
  • Liquid-solid flow
  • Non-Newtonian fluid
  • Xanthan gum

ASJC Scopus subject areas

  • Engineering(all)
  • Earth and Planetary Sciences(all)

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