The Shear and Extensional Rheology of Polymer Dispersions
type: CreativeWork
description: For the oil and gas extraction process, the understanding of well construction fluids (WCFs) were found to be fundamental towards the success and safety of the operation. This is due to the multiple functions the fluid provides such as maintaining the well bore formation pressure, lubricating the drill bit and transporting any drill cuttings to the surface. The well construction process methodology had been adapted towards carbon storage which promotes the research towards the understanding of well construction fluid rheology. WCFs generally present thixotropic or yield stress rheological behaviours. Additives are often used to promote the rheological properties. This causes the WCFs to have multiple phases present and much more complex interactions of polymers, emulsions, and particles. With the complex formulations, the process involves the WCFs to be pumped alongside a highly complex drill bit geometry. The shear rates required to pump from the surface of the well bore to the drill bit can range from 5 to 105 s-1. When WCFs are pumped to the drill bit, the fluids are contracted and expanded into the well bore. This causes the fluid to undergo both shear and extensional strains. With the process involving the complex formulations and flow regimes, it is ideal to understand the rheology in the shear and extensional regime over a range of shear rates. It is also essential to understand the interactions within the fluid and its impact on the rheology of the fluid. The topic of research for this PhD is to understand the rheological behaviours of WCFs. To understand the rheology of these complex fluids, the goal was to develop a simulation that can accurately calculate the rheological behaviour for WCFs. Simulations are an important and useful tool to obtain a ballpark range of any parameters under investigation. The methodology was defined by examining three types of fluids: Newtonian, viscoelastic and finally complex, multiphase fluids. This led to used silicone oil,…
abstract: For the oil and gas extraction process, the understanding of well construction fluids (WCFs) were found to be fundamental towards the success and safety of the operation. This is due to the multiple functions the fluid provides such as maintaining the well bore formation pressure, lubricating the drill bit and transporting any drill cuttings to the surface. The well construction process methodology had been adapted towards carbon storage which promotes the research towards the understanding of well construction fluid rheology. WCFs generally present thixotropic or yield stress rheological behaviours. Additives are often used to promote the rheological properties. This causes the WCFs to have multiple phases present and much more complex interactions of polymers, emulsions, and particles. With the complex formulations, the process involves the WCFs to be pumped alongside a highly complex drill bit geometry. The shear rates required to pump from the surface of the well bore to the drill bit can range from 5 to 105 s-1. When WCFs are pumped to the drill bit, the fluids are contracted and expanded into the well bore. This causes the fluid to undergo both shear and extensional strains. With the process involving the complex formulations and flow regimes, it is ideal to understand the rheology in the shear and extensional regime over a range of shear rates. It is also essential to understand the interactions within the fluid and its impact on the rheology of the fluid. The topic of research for this PhD is to understand the rheological behaviours of WCFs. To understand the rheology of these complex fluids, the goal was to develop a simulation that can accurately calculate the rheological behaviour for WCFs. Simulations are an important and useful tool to obtain a ballpark range of any parameters under investigation. The methodology was defined by examining three types of fluids: Newtonian, viscoelastic and finally complex, multiphase fluids. This led to used silicone oil,…
author: Umashanker, Janaki
language: eng
keywords: Contraction Flow, Polymer Solutions, Rheology, Simulation
license: https://www.repository.cam.ac.uk/bitstreams/c731c6f4-6a14-42a4-aa4e-d1220f352283/download
license: http://purl.org/NET/rdflicense/allrightsreserved
date published: 2022-12-07
date modified: 2026-07-24T01:33:05Z
provider: Cambridge University
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: University of Cambridge

PropertyValue
property ID: DOI
value: 10.17863/CAM.99816