Effects of the pipe-wall rheological behaviour on hydraulic transient pressures

2009 ◽  
pp. 57-60
Author(s):  
Alexandre Soares ◽  
Dídia Covas ◽  
Luisa Reis ◽  
Helena Ramos
Keyword(s):  
Pipe Wall ◽  
Rheological Behaviour ◽  
Hydraulic Transient

scholarly journals Flow behaviour of water-in-oil emulsions stabilized by wax crystals

2021 ◽  
Author(s):  
Roomana Aafaqi
Keyword(s):  
Crude Oil ◽  
Pipe Wall ◽  
Rheological Behaviour ◽  
Flow Behaviour ◽  
Large Temperature ◽  
Gelation Temperature ◽  
Emulsion Flow ◽  
Oil Emulsions ◽  
Polyglycerol Polyricinoleate ◽  
Wax Crystals

The large temperature gradients experienced by crude oil emulsions in pipelines found in colder environments can lead to the precipitation, deposition and build-up of wax-like species from the crude oil onto the pipe wall that result in flow assurance problems. The objective of this thesis was to understand the rheological behaviour of model water-in-oil emulsions stabilized by wax crystals. The microstructure, phase transitions and rheology of model emulsions constisting of water, mineral oil, parrafin wax and the emulsifier polyglycerol polyricinoleate (PgPr) were investigated. Changes in emulsion flow begaviour (steady state and dynamic) as a function of composition, termperature and passage through a laboratory-scale flowloop were investigated, with these parameters significantly affecting shear flow, yield stress and viscoelasticity. The gelation temperature of wax-containing ('waxy') oil was slightly lower than that of its equivalent emulsion due to differences in the structure of the gelled emulsion network. Overall, this study successfully showed that there exist significant differences in the microstructure and flow behaviour of model crude oil emulsions when wax and a dispersed aqueous phase are present.

scholarly journals Flow behaviour of water-in-oil emulsions stabilized by wax crystals

2021 ◽  
Author(s):  
Roomana Aafaqi
Keyword(s):  
Crude Oil ◽  
Pipe Wall ◽  
Rheological Behaviour ◽  
Flow Behaviour ◽  
Large Temperature ◽  
Gelation Temperature ◽  
Emulsion Flow ◽  
Oil Emulsions ◽  
Polyglycerol Polyricinoleate ◽  
Wax Crystals

The large temperature gradients experienced by crude oil emulsions in pipelines found in colder environments can lead to the precipitation, deposition and build-up of wax-like species from the crude oil onto the pipe wall that result in flow assurance problems. The objective of this thesis was to understand the rheological behaviour of model water-in-oil emulsions stabilized by wax crystals. The microstructure, phase transitions and rheology of model emulsions constisting of water, mineral oil, parrafin wax and the emulsifier polyglycerol polyricinoleate (PgPr) were investigated. Changes in emulsion flow begaviour (steady state and dynamic) as a function of composition, termperature and passage through a laboratory-scale flowloop were investigated, with these parameters significantly affecting shear flow, yield stress and viscoelasticity. The gelation temperature of wax-containing ('waxy') oil was slightly lower than that of its equivalent emulsion due to differences in the structure of the gelled emulsion network. Overall, this study successfully showed that there exist significant differences in the microstructure and flow behaviour of model crude oil emulsions when wax and a dispersed aqueous phase are present.

Rheological behaviour of the condensed suspension of fluorinated montmorillonite “rassoul” particles in aqueous medium

2005 ◽  
Vol 123 ◽  
pp. 341-344
Author(s):  
A. Khaldoun ◽  
F. González-Caballero ◽  
J. G. López-Durán ◽  
N. Mahrach ◽  
M. L. Kerkeb
Keyword(s):  
Aqueous Medium ◽  
Rheological Behaviour

Rheological Behaviour of Diutan Gum and Its Effects as a Drag Reducing Agent

2019 ◽  
Author(s):  
Walber Ronconi dos Santos ◽  
Edson Soares ◽  
Renato Siqueira
Keyword(s):  
Rheological Behaviour ◽  
Reducing Agent

Development of a mathematical model of the influence of wall thickness on the strain rate when profiling pipes by drawing

2020 ◽  
pp. 49-52
Author(s):  
R.A. Okulov ◽  
N.V. Semenova
Keyword(s):  
Mathematical Model ◽  
Strain Rate ◽  
Wall Thickness ◽  
Pipe Wall ◽  
Strain Intensity ◽  
Thickness Strain ◽  
Pipe Wall Thickness

The change in the intensity of the deformation of the pipe wall during profiling by drawing was studied. The dependence of the strain intensity on the wall thickness of the workpiece is obtained to predict the processing results in the production of shaped pipes with desired properties. Keywords drawing, profile pipe, wall thickness, strain rate. [email protected]

scholarly journals Alkali-activated laterite binders: Influence of silica modulus on setting time, Rheological behaviour and strength development

2021 ◽  
pp. 100175
Author(s):  
Cyriaque Rodrigue Kaze ◽  
Adeyemi Adesina ◽  
Gisèle Laure Lecomte-Nana ◽  
Thamer Alomayri ◽  
Elie Kamseu ◽  
...  
Keyword(s):  
Setting Time ◽  
Rheological Behaviour ◽  
Strength Development ◽  
Alkali Activated
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