Blar i UiS Brage på forfatter "Kelland, Malcolm Andrew"
-
5-Methyl-3-vinyl-2-oxazolidinone-Investigations of a New Monomer for Kinetic Hydrate Inhibitor Polymers
Kelland, Malcolm Andrew; Dirdal, Erik Gisle; Ghosh, Radhakanta; Ajiro, Hiroharu (Peer reviewed; Journal article, 2022)Kinetic hydrate inhibitors (KHIs) are polymers used in a chemical method to prevent gas hydrate plugging of oil and gas production flow lines. The main ingredient in a KHI formulation is one or more water-soluble amphiphilic ... -
Advances in the Study of Gas Hydrates by Dielectric Spectroscopy
Kelland, Malcolm Andrew; Varfolomeev, Mikhail A.; lunev, Ivan; Kamaliev, Bulat; Gusev, Yuriy; Kiiamov, Airat; Zaripova, Yulia F.; Galiulin, Artur; Farhadian, Abdolreza (Peer reviewed; Journal article, 2021)The influence of kinetic hydrate inhibitors on the process of natural gas hydrate nucleation was studied using the method of dielectric spectroscopy. The processes of gas hydrate formation and decomposition were monitored ... -
Alternative Lactam-Based Kinetic Hydrate Inhibitors - Investigation of Polymers of 2‑Methacrylamido-caprolactam
Dirdal, Erik Gisle; Kelland, Malcolm Andrew (Peer reviewed; Journal article, 2022)Kinetic hydrate inhibitors (KHIs), such as poly(N-vinylcaprolactam) (PVCap) and related copolymers, are a well-known method to help combat gas hydrate formation in oil and gas field production flow lines. The caprolactam ... -
Boronic and Organic Acids as Synergists for a Poly(N-vinylcaprolactam) Kinetic Hydrate Inhibitor
Kelland, Malcolm Andrew; Dirdal, Erik Gisle (Peer reviewed; Journal article, 2021-12)A range of boronic acids have been investigated as synergists for the kinetic hydrate inhibitor (KHI) polymer, poly(N-vinylcaprolactam) (PVCap, Mw ≈ 10,000 g/mol) using high pressure rocking cells, a natural gas mixture, ... -
Challenges with Gas Hydrate Formation
Kelland, Malcolm Andrew (Peer reviewed; Journal article, 2019)Many multiphase flow lines are prone to hydrate formation unless prevention methods are put in place. Chemical management of hydrate formation is traditionally done with thermodynamic hydrate inhibitors but in the last 25 ... -
Crystal Growth Inhibition of Tetrahydrofuran Hydrates with Ring-Structured Amine Oxides
Knutsen, Cecilie Meidell (Bachelor thesis, 2023)Gas hydrates are clathrate crystalline solids created when water and small gas molecules are subjected to high pressures and low temperatures. Gas hydrate formation is a major problem in the oil and gas industry as it can ... -
En etablert manual for korrosjons testing og korrosjons hemmer analyse
Undheim, Camilla (Bachelor thesis, 2021)Utviklet manual for å utføre CO2 korrosjons testing med utstyr supplert av Gamry Instruments. Manualen inneholder fåreslåtte prosedyrer på hvordan en kan sette sammen utstyret, hvordan en kan utføre lineær polarisasjons ... -
Exploring Modified Alendronic Acid as a New Inhibitor for Calcium-Based Oilfield Scales
Mady, Mohamed Fawzy Hamed Attia; Ortega, Rocio Carolina; Kelland, Malcolm Andrew (Peer reviewed; Journal article, 2022-02)Organophosphorus compounds are well known as oilfield scale inhibitors. Earlier work showed that a series of new and well-known bone-targeting drugs incorporating non-toxic bisphosphonates (BPs) (PO3H2–C–PO3H2) gave good ... -
Field test investigation of the performance of corrosion inhibitors: a case study
Gharbi, Kheira; Chouicha, Samira; Kelland, Malcolm Andrew (Peer reviewed; Journal article, 2021-09)Corrosion is considered one of the major problems that affect flow assurance during hydrocarbon production. This irreversible phenomenon has the ability to cause serious material failure in the oil and gas industry. ... -
Further Investigation of Solvent Synergists for Improved Performance of Poly(N-vinylcaprolactam)-Based Kinetic Hydrate Inhibitors
Dirdal, Erik Gisle; Kelland, Malcolm Andrew (Peer reviewed; Journal article, 2021)Poly(N-vinylcaprolactam) (PVCap) and related copolymers have been used as kinetic hydrate inhibitors (KHIs) to combat gas hydrate formation in oil and gas field production flow lines. It is known that the addition of certain ... -
High Cloud Point Polyvinylaminals as Non-Amide-Based Kinetic Gas Hydrate Inhibitors
Kelland, Malcolm Andrew; Dirdal, Erik Gisle; Zhang, Qian (Peer reviewed; Journal article, 2020-06)In recent years, we have explored non-amide-based classes of kinetic hydrate inhibitor (KHI) polymers to determine if the same level of performance can be achieved as commercial KHI polymers, which all contain amide groups. ... -
High-Performance Kinetic Hydrate Inhibition with Poly(N-isopropyl methacrylamide) and Triisopentylamine Oxide─Surprising Concentration-Dependent Results
Ghosh, Radhakanta; Pomicpic, Janronel Calog; Kelland, Malcolm Andrew (Peer reviewed; Journal article, 2023)Kinetic hydrate inhibitors (KHIs) are mostly used to prevent the deposition of gas hydrates in gas and condensate production flow lines. The main component in a KHI formulation is a water-soluble polymer, blended with ... -
Investigation of the Antiscaling Performance of Phosphonated Chitosan for Upstream Petroleum Industry Application
Mady, Mohamed Fawzy Hamed Attia; Abdel-Azeim, Safwat; Kelland, Malcolm Andrew (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 ... -
Maleic and Methacrylic Homopolymers with Pendant Dibutylamine or Dibutylamine Oxide Groups as Kinetic Hydrate Inhibitors
Kelland, Malcolm Andrew; Pomicpic, Janronel Calog; Ghosh, Radhakanta (Peer reviewed; Journal article, 2022)Kinetic hydrate inhibitors (KHIs) are applied in oil and gas fields to prevent gas hydrate formation, most often in cold subsea flow lines. The main component in industrial KHI formulations is a water-soluble polymer with ... -
Multi-functional Flow Assurance Chemicals: Corrosion and Kinetic Hydrate Inhibition from Maleic Anhydride:N-Vinyl Caprolactam Copolymers and Synergists
Kelland, Malcolm Andrew; Pomicpic, Janronel Calog; Ghosh, Radhakanta; Undheim, Audun (Peer reviewed; Journal article, 2023)Water-based flow assurance issues include corrosion, scale, and gas hydrate formation. Chemical solutions to mitigate these issues usually require separate inhibitors, which sometimes can lead to compatibility difficulties. ... -
Multi-functional oilfield production chemicals: maleic-based polymers for gas hydrate and corrosion inhibition
Kelland, Malcolm Andrew; Pomicpic, Janronel Calog; Ghosh, Radhakanta; Undheim, Camilla; Hemmingsen, Tor; Zhang, Qian; Varfolomeev, Mikhail A.; Pavelyev, Roman S.; Vinogradova, Svetlana S. (Peer reviewed; Journal article, 2021)Several chemical problems can occur during the production of oil and gas through flow lines. This includes corrosion, scale deposition and gas hydrate plugging. Three separate chemicals may be needed to treat these issues. ... -
New Developments in Demulsifier Chemistry
Alfsvåg, Elina (Masteroppgave/UIS-TN-IKBM/2018;, Master thesis, 2018-07-13)Sixteen new demulsifier chemicals were prepared based on dendrimer chemistry. They were designed to be amphiphilic with hydrophilic ethoxylated blocks, hydrophobic polyester dendrimer cores and alkyl chains. Three different ... -
Non-Amide Polymers as Kinetic Hydrate Inhibitors-Maleic Acid/ Alkyl Acrylate Copolymers and the Effect of pH on Performance
Pomicpic, Janronel Calog; Ghosh, Radhakanta; Kelland, Malcolm Andrew (Peer reviewed; Journal article, 2021)Kinetic hydrate inhibitors (KHIs) have been used for over 25 years to prevent gas hydrate formation in oil and gas production flow lines. The main component in KHI formulations is a water-soluble polymer with many amphiphilic ... -
Nonpolymeric Citramide-Based Kinetic Hydrate Inhibitors: Good Performance with Just Six Alkylamide Groups
Ghosh, Radhakanta; Kelland, Malcolm Andrew (Peer reviewed; Journal article, 2022)The use of kinetic hydrate inhibitors (KHIs) is a well-known method for preventing gas hydrate formation in oil and gas production flow lines. The main ingredient in KHI formulations is one or more polymers with amphiphilic ... -
N‑Oxide Polyethers as Kinetic Hydrate Inhibitors: Side Chain Ring Size Makes the Difference
Zhang, Qian; Limmer, Larissa; Frey, Holger; Kelland, Malcolm Andrew (Peer reviewed; Journal article, 2021)The formation of gas hydrates in flow lines is one of the most severe problems for flow assurance in the gas and oil industry. Developing effective kinetic hydrate inhibitors (KHIs) to avoid the problem of gas hydrate ...