Blar i Faculty of Science and Technology på tittel
Viser treff 3550-3569 av 7021
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Investigation of the Antiscaling Performance of Phosphonated Chitosan for Upstream Petroleum Industry Application
(Peer reviewed; Journal article, 2021)Scale deposition is one of the main water-based production problems in the upstream oil and gas industry. Few environmentally friendly scale inhibitors show good thermal stability as well as calcium compatibility. We report ... -
Investigation of the corrosion properties of 316L in marine atmosphere and assessment of the effectiveness of different surface repassivation products
(Masteroppgave/UIS-TN-IMBM/2018;, Master thesis, 2018)The major purpose of this thesis was to investigate and assess what effect of repassivation product has on corrosion resistance of 316L in marine atmosphere. Additionally, compare the chemical composition with the certificate. ... -
Investigation of the Effect of Fracturing Fluids on Shale Pore Structure by Nuclear Magnetic Resonance
(Peer reviewed; Journal article, 2023)Hydraulic fracturing technology significantly enhances the productivity of shale oil and gas reservoirs. Nonetheless, the infiltration of fracturing fluid into shale formations can detrimentally affect the microscopic pore ... -
An investigation of the effects and consequences of combining Expanding Dual Pin with radial spherical plain bearings
(Peer reviewed; Journal article, 2022)An expanding pin locks the pin assembly to its supports and bearings and prevents any relative movements between the surfaces in contact. In this study, the diameter changes of the bearing inner ring as a function of the ... -
Investigation of the enantioselectivity of acetylcholinesterase and butyrylcholinesterase upon inhibition by tacrine-iminosugar heterodimers
(Peer reviewed; Journal article, 2023-09)The copper-catalysed azide-alkyne cycloaddition was applied to prepare three enantiomeric pairs of heterodimers containing a tacrine residue and a 1,4-dideoxy-1,4-imino-D-arabinitol (DAB) or 1,4-dideoxy-1,4-imino-L-arabinitol ... -
Investigation of the hydraulic integrity of cement plug: Oilwell cementitious materials
(Peer reviewed; Journal article, 2023)The loss of hydraulic integrity in oil and gas wells due to the loss of cement sheath sealability can lead to environmental contamination, annular pressure build-up, and safety threats. In this study, we examine the hydraulic ... -
Investigation of the mechanical properties of Acacia tortilis fiber reinforced natural composite
(Peer reviewed; Journal article, 2020-10)The work presented in this paper is motivated by the fact that use of natural fiber materials for structural and non-structural applications have increased within the last two decades. In addition to the known benefits of ... -
Investigation of the performance of a heat pump that uses CO2 as working fluid.
(Bachelor thesis, 2023)Climate change is one of the greatest challenges facing the world today, and reducing greenhouse gas emissions is a critical part of mitigating its impacts. Conventional residential heat pumps use Hydrofluorocarbons (HFCs) ... -
Investigation of the Physiological Function of Protein Phosphatase 4 (PP4) in Arabidopsis thaliana
(Masteroppgave/UIS-TN-IMN/2016;, Master thesis, 2016-06-14)Protein Phosphatase 4 (PP4), a member of serine/threonine-specific phospho-protein phosphatases (PPP) family, is remarkably well conserved across eukaryotes. PP4 has been studied mainly in yeast and mammalian cells, and ... -
Investigation of the transport mechanism of the cutting transport in drilling horizontal wells using high speed camera and PIV for analysis
(Masteroppgave/UIS-TN-IPT/2017;, Master thesis, 2017-06-15)Dynamical feature of particle dunes is investigated in a horizontal drilling well. Apparently, it is quite challenging to transport the cuttings in horizontal section of the well because the cuttings tend to settle down ... -
Investigation of torsional drillstring motion using finite element model
(Master thesis, 2021)In the thesis , a four degree of freedom dynamic drill string model suitable for prediction of self-excited torsional vibrations is modeled using the finite element method. The drill string equation of motion subjected to ... -
Investigation of transient scenarios in underbalanced drilling
(Masteroppgave/UIS-TN-IPT/2012;, Master thesis, 2012)When drilling underbalanced wells, the standard way consists to drill with a very low mud weight in order to obtain a well pressure lower than pore pressure. The flow of the fluids from the reservoir up to the tubing is ... -
Investigation of transitional turbulence models for CFD simulation of the drag crisis for flow over a sphere
(Peer reviewed; Journal article, 2019)The drag crisis is an interesting physical phenomenon for flow over bluff bodies, where the drag coefficient suddenly drops as the Reynolds number increases. This behavior is caused by the flow transitioning from laminar ... -
Investigation of transitional turbulence models to predict drag crisis for flow over spheres and cylinder
(Masteroppgave/UIS-TN-IMBM/2019;, Master thesis, 2019-06-14)The current work performed experimental and numerical studies of flow over cylinders and spheres. The purpose is to investigate whether the drag crisis phenomenon can be predicted, and to gain insight into the transition ... -
Investigation of updating methods for probability-informed inspection planning for offshore structures
(Peer reviewed; Journal article, 2019)The paper presents a novel process for probability-informed inspection planning based on the following principles. 1) A description of the strength of knowledge about a problem shall be included and be accounted for in the ... -
Investigation of vibration assisted cementing - a CFD study
(Master thesis, 2021)Abstract Primary cementing operations in the oil and gas industry are considered critical and complicated. For cementing operations to be successful, the fluid displacement in the annular volume has to be close to perfect. ... -
Investigation of Vinyl Ether Synthesis and Subsequent Application in Organic Synthesis
(Masteroppgave/UIS-TN-IKBM/2019;, Master thesis, 2019-06-15)The standard method of synthesizing vinyl ethers from the elimination of an alcohol from an acetal was tested against synthesizing them through the elimination of a mesyloxy group. A total of seven different molecules were ... -
Investigation of which sea state yield the dominating contribution to fatigue accumulation in offshore structures
(Masteroppgave/UIS-HF-IKM 2014;, Master thesis, 2014-06-23)Majority of the fatigue damage on offshore structures is generally assumed to be caused by relatively frequently occurring moderate sea states, i.e. sea states with significant wave height in the range of 4m - 8m.On the ... -
Investigation on Phosphorus Recovery from Wastewater Sludge as Struvite at SNJ Wastewater Treatment Plant (IVAR): A Pilot-Scale Study
(Master thesis, 2021)The recovery of phosphorus from wastewater is desirable since it is a limited nutrient and can cause eutrophication in water bodies. This study investigates the potential to recover phosphorus from the sludge generated at ... -
Investigation on The Mechanical Properties of CO2 Cured Concrete with Natural Aggregates.
(Bachelor thesis, 2021)Betongproduksjon er en av industriene med størst CO2 utslipp i verden. En liten reduksjon i CO2 utslippene fra denne industrien kan derfor være svært gunstig for å nå klimamålene. Herding ved akselerert karbonatisering ...