Browsing Fakultet for ingeniørvitenskap (IV) by Title
Now showing items 4600-4619 of 23496
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Cuttings Bed Erosion
(Master thesis, 2017)The growth of cuttings beds in horizontal and highly inclined wells in the wellbore is one of the main problems in oil and gas industry. The main purpose of this project is to find the flow velocity at which the erosion ... -
Cuttings Bed Erosion in Horizontal Wells
(Master thesis, 2016)Many of the time consuming and economically demanding drilling problems faced today can be tracked back to poor hole cleaning, even more so when drilling through highly inclined sections. Improved hole cleaning operations ... -
Cuttings bed erosion using a selection of interstitial fluids
(Master thesis, 2024)I boreoperasjoner kan effektiv hullrensing være utfordrende. Borekaks har en tendens til å samle seg langs borehullsveggen, noe som kan føre til fastkjørte borerør, brudd, redusert borehastighet (ROP) og andre problemer ... -
Cuttings bed erosion using a selection of interstitial fluids
(Master thesis, 2024)I boreoperasjoner kan effektiv hullrensing være utfordrende. Borekaks har en tendens til å samle seg langs borehullsveggen, noe som kan føre til fastkjørte borerør, brudd, redusert borehastighet (ROP) og andre problemer ... -
Cuttings Transport in Inclined Sections
(Master thesis, 2017)Mud rheology is a key parameter in hole cleaning efficiency. Field data suggests that oil-based drilling fluids perform better compared to water based drilling fluids in the field, even with identical rheological properties, ... -
Cuttings Transport Modeling - Part 1: Specification of Benchmark Parameters with a Norwegian Continental Shelf Perspective
(Journal article; Peer reviewed, 2018)In oil and gas drilling, cuttings transport related problems are a major contributor to well downtime and costs. As a result, solutions to these problems have been extensively researched over the years, both experimentally ... -
Cuttings transport: On the effect of drill pipe rotation and lateral motion on the cuttings bed
(Peer reviewed; Journal article, 2020)Drill pipe rotation is considered a relevant factor for cuttings transport and hole cleaning. However, in the term “rotation” is often used as a moniker for the combination of plain drill pipe rotation around its own axis ... -
Cyber Risk Perception in Offshore Operations: An Exploratory Study of Deck Officers’ Perceptions of Cyber Risks in Norwegian Shipping Companies
(Doctoral thesis, 2024)The digital evolution of the maritime industry has given rise to new cybersecurity challenges and increased cyber risks for shipping companies and their vessels. At sea, losses from cyberattacks are not just monetary but ... -
Cyber Risk Perception in the Maritime Domain: A Systematic Literature Review
(Peer reviewed; Journal article, 2021)This paper aims to present an approach to investigate cyber risk perception with use of recognized psychological models, and to give an overview of state-of-the-art research within the field of cyber risk perception in ... -
Cyber Security Issues in Navigation Systems of Marine Vessels From Control Perspective
(Chapter, 2017)Autonomous marine vessels are the way forward to revolutionize maritime operations. However, the safety and success of autonomous missions depend critically on the availability of a reliable positioning system and time ... -
CYBER SECURITY OF SAFETY INSTRUMENTED SYSTEMS
(Master thesis, 2023)Cybersikkerhet for sikkerhetsinstrumenterte systemer tar sikte på å tilby et rammeverk for å adressere en sikker ved design, strategi for å beskytte og sikre tilgjengeligheten til industriell automatisering og kontroll- ... -
Cyber Trust in the Norwegian Online Flea Market: An Ethnographic Study on Fraud
(Chapter, 2020)This work-in-progress paper reports an ethnographic study on how cyber trust could be designed to prevent online fraud. A yearlong ethnographic study was conducted with a group of victims who were scammed in online shopping. ... -
Cyber-Physical Systems in Libraries
(Master thesis, 2023)Formålet med denne oppgaven er å utforske kunnskapsgapet mellom biblioteksektoren og muligheter innen digitalisering. Mer spesifikt tar denne avhandlingen stilling til bruken av dataintegrerte produksjonssystemer eller ... -
Cybersikkerheit i maritim industri
(Bachelor thesis, 2021)Bakgrunn: IMO-resolusjon MSC.428(98) stiller krav til innføring av cyberrisiko i sikkerheitsstyringssystem om bord innan første «Document of Compliance»-revisjon i 2021. Kombinert med eit auka tal cyberåtak, har dette gjort ... -
Cybersikkerhet og situasjonsbevissthet i maritim næring: En kvalitativ studie av skipsoperatørers erfaringer
(Master thesis, 2024)Bakgrunn: Cybersikkerhet er et tema som stadig blir viktigere for maritime og offshore-industrier grunnet rask digital transformasjon, og situasjonsbevissthet er en viktig teori for å kunne forklare og forstå menneskelig ... -
Cyclic behavior and strain energy-based fatigue damage analysis of mooring chains high strength steel
(Peer reviewed; Journal article, 2020)This study investigates the low-cycle fatigue behavior of mooring chains high-strength steel grade R4 under different strain amplitudes and strain ratios at room temperature. A fatigue test program has been carried out on ... -
Cyclic Behaviour of Water Saturated Dense Sand
(Master thesis, 2017)Several monotonic and cyclic triaxial tests have been performed at NGI in association with the ongoing strategic project, SP9. The test material is dense saturated sand from the Siri offshore field in the North Sea, and ... -
Cyclic Compression Testing of Three Elastomer Types— A Thermoplastic Vulcanizate Elastomer, a Liquid Silicone Rubber and Two Ethylene-Propylene-Diene Rubbers
(Peer reviewed; Journal article, 2022)Thermoplastic elastomer vulcanizate (TPV) and liquid silicone rubber (LSR) are replacement candidates for ethylene-propylene-diene rubbers (EPDM), as they offer the possibility for twocomponent injection moulding. In this ... -
Cyclic fatigue in unlined hydro tunnels caused by pressure transients
(Peer reviewed; Journal article, 2021)Regulated hydropower is currently the most capable load balancing technology for the future renewable energy system which will be characterized by a large share of unregulated energy from solar and wind power. Increased ... -
Cyclic oedometer swelling tests on rocks from North-Central Luzon, Philippines
(Chapter, 2020)Tunnels passing through swelling rocks are subjected to stability problems as moisture changes affect the material properties of the rocks. The drying out process during construction may cause local contraction stresses ...