Now showing items 213-232 of 572

    • Enabling long cycle life lithium-ion capacitors through electrode-electrolyte interface optimization 

      Eleri, Obinna Egwu (PhD thesis UiS;749, Doctoral thesis, 2024)
      Electrode-electrolyte interfaces in electrochemical cells represent critical boundaries between the electrode and electrolyte where most charge transfer or storage processes are initiated. Accordingly, the interface ...
    • Energibrønner 

      Andersen, Amalie Frafjord; Kolstø, Sara Marlen (Bachelor thesis, 2023)
      Det foreligger i dag et stort behov for å finne nye grønne energikilder som er bærekraftige. Vi trenger nye energikilder som ikke påvirker miljøet negativt og som i tillegg gir stabil tilførsel av energi gjennom hele året. ...
    • Energibrønner 

      Kolstø, Sara Marlen; Andersen, Amalie Frafjord (Bachelor thesis, 2023)
      Det foreligger i dag et stort behov for å finne nye grønne energikilder som er bærekraftige. Vi trenger nye energikilder som ikke påvirker miljøet negativt og som i tillegg gir stabil tilførsel av energi gjennom hele året. ...
    • Energy, exergy and environmental analysis of a novel combined system producing power, water and Hydrogen 

      Parham, Kiyan; Alimoradiyan, Hamed; Assadi, Mohsen (Peer reviewed; Journal article, 2017)
      During last years, absorption heat transformers have been used widely for boosting low-grade heat sources. In this paper, a novel multi-generation system including an open absorption heat transformer (OAHT), an organic ...
    • ERD Wells & Drag Calculations 

      Ramstad, Magnus Fosnes (Bachelor thesis, 2021)
      This thesis investigated Extended reach drilling (ERD), which is the term for drilling high-angle, long horizontal directional wells. ERD wells has had tremendous developments, as new technology continues to break worlds ...
    • Estimation of shear rate change in vertically oscillating non-Newtonian fluids: Predictions on particle settling 

      Amaratunga, Polwattage Don Malitha Maduran; Rabenjafimanantsoa, Herimonja Andrianifaliana; Time, Rune (Peer reviewed; Journal article, 2020)
      This study investigates the effect of oscillatory motion on velocity and shear rate change within different non-Newtonian, slightly viscoelastic fluids oscillated in a vertical U-shaped circular pipe. An estimation to ...
    • Estimation of the Free Rotating Hook Load for WOB Estimation 

      Fernandez Berrocal, Miguel (Master thesis, 2022)
      Today’s drilling industry emphasizes safety and deeper drilling while reducing drilling costs. Low rate of penetration (ROP) and non-productive time are two main reasons for reduced drilling efficiency. Machine Learning ...
    • Evaluation of asphaltene deposition during CO2 enhanced oil recovery 

      Stychlerz Jan (Master thesis, 2021)
      Over the years carbon dioxide has been gaining immense attention. Being one of the main greenhouse gases, it contributes to the increment of the global temperature more and more significantly. Existing as a by-product of ...
    • Evaluation of Casing Exit Setting Depth Criteria for Whipstock 

      Haarberg, Sindre (Masteroppgave/UIS-TN-IEP/2019;, Master thesis, 2019-06)
      Baker Hughes GE has conducted several hundred whipstock operations over the last years on the NCS with a high success rate. This work will go into detail on some of the operations that were less successful, particularly ...
    • Evaluation of umbilical-less subsea operations 

      Herland, Viljar (Master thesis, 2023)
      The oil and gas industry are always seeking new technologies and ideas to lower the Health, Safety and Environment (HSE) risk, while also enhancing their operations. There is also a pressure from the governments that oil ...
    • Experimental Analysis of Multi-phase flows in orifice 

      Wali, Muhammed Ahmed Salar (Master thesis, 2022)
      In order to understand the behavior of multi-phase flow through orifices in horizontal pipes, an experimental approach is applied that utilizes the available flow rig in the multi-phase flow laboratory at the University ...
    • Experimental Analysis of Oil Recovery in Core Samples 

      Salomonsen, Liva (Bachelor thesis, 2021)
      An experimental analysis of oil recovery in core samples during spontaneous and forced imbibition have been performed. Grey Berea sandstone cores with a permeability around 120 mD have been used in the experiments. The ...
    • Experimental and Machine Learning Based Modeling of Sand Production Study 

      Skudal, Håkon Mikael (Bachelor thesis, 2023)
      This thesis delves into the complex issue of sand production in the oil and gas industry, with a focus on the role and performance of Wire Wrapped Screen and 20 Mesh sand control systems. Recognizing that sand production ...
    • Experimental and theoretical investigation of the mechanisms of drying during CO2 injection into saline reservoirs 

      Sokama-Neuyam, Yen Adams; Yusof, Muhammad Aslam Md; Owusu, Shadrack Kofi; Darkwah-Owusu, Victor; Turkson, Joshua Nsiah; Otchere, Adwoa Sampongmaa; Ursin, Jann Rune (Peer reviewed; Journal article, 2023)
      A viable CO2 storage resource must have sufficient storage capacity, reliable containment efficiency and adequate well injectivity. Deep saline formations stand out in terms of storage capacity and containment efficiency. ...
    • Experimental Bench-Scale Study on Cuttings-Bed Erosion in Horizontal Wells 

      Pedrosa Consicion, Herman Camilo; Lund, Bjørnar; Opedal, Nils van der Tuuk; Ytrehus, Jan David; Saasen, Arild (Peer reviewed; Journal article, 2022)
      Cuttings-beds formation while drilling wellbores is a common challenge, especially for horizontal wells, as drilled particles have higher area to be deposited and form cuttings-beds, which can cause several problems such ...
    • Experimental Evaluation of the Effect of Temperature on the Mechanical Properties of Setting Materials for Well Integrity 

      Ogienagbon, Adijat Ayobami; Khalifeh, Mahmoud (Peer reviewed; Journal article, 2022)
      A fundamental understanding of the mechanical properties of zonal isolation materials is important for predicting well integrity during well operation conditions. Conventionally, the mechanical properties of zonal isolation ...
    • Experimental Investigation and Transient Flow Modelling of the Bullheading Process 

      Alfonso, Manuel Alejandro; Patino, Oscar Giovanni (Masteroppgave/UIS-TN-IEP/2020;, Master thesis, 2020-07-15)
      The main objective of this thesis was to design and study a physical laboratory scale model, to simulate a kick and push it through the bullheading method. The air bubble was injected in a cylindrical loop system filled ...
    • EXPERIMENTAL INVESTIGATION OF ABSORPTION OF CO2 IN WATERBASED SOLUTIONS. 

      Jacobsen, Maria L. (Master thesis, 2022)
      An investigation of Carbon dioxide absorption and desorption is carried out to understand the diffusion and flow mechanism of a pressurized CO2 gas cap in an water-based solution (WBS) and to accurately quantify the \cooo ...
    • An Experimental Investigation of Density-Unstable Displacement in a Vertical Annulus with Relevance to «Reverse Heavy Over Light" Cementing Technology 

      Bjoernsen, Camilla Natalie (Masteroppgave/UIS-TN-IEP/2020;, Master thesis, 2020-07-15)
      Primary cementing of casing is considered a critical and complex well operation. During the operating, the drilling fluid is displaced by pumping a fluid train of washer, spacer, and cement slurry into the well. The aim ...
    • Experimental Investigation of Heavy over Light Fluid Mix Phenomena in Vertical Wells 

      Karlsen, Linn Engan (Masteroppgave/UIS-TN-IEP/2018;, Master thesis, 2018-05)
      The Heavy over Light (HOL) solution, invented by Reelwell, is a main feature of the Reelwell Drilling Method (RDM) and has the potential to improve the capability to drill through challenging pressure zones. This solution ...