Blar i UiS Brage på forfatter "Kelland, Malcolm Andrew"
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N‑Vinyl Caprolactam/Maleic-Based Copolymers as Kinetic Hydrate Inhibitors: The Effect of Internal Hydrogen Bonding
Kelland, Malcolm Andrew; Pomicpic, Janronel Calog; Ghosh, Radhakanta; Abdel-Azeim, Safwat (Peer reviewed; Journal article, 2022)Kinetic hydrate inhibitors (KHIs) have been used for over 25 years to prevent gas hydrate formation in oil and gas production flow lines, but they are some of the most expensive oilfield production chemicals. The main ... -
Oxyvinylenelactam Polymers-A New Class of Lactam-Based Kinetic Hydrate Inhibitor Polymers
Kelland, Malcolm Andrew; Ghosh, Radhakanta; Undheim, Audun; Dirdal, Erik Gisle; Ajiro, Hiroharu (Peer reviewed; Journal article, 2022)The deployment of kinetic hydrate inhibitors (KHIs) is a chemical method for the prevention of gas hydrate plugging in gas, condensate, and oil production flow lines. Polymers made using the monomer N-vinylcaprolactam ... -
Performance of Waterborne Polyurethanes in Inhibition of Gas Hydrate Formation and Corrosion: Influence of Hydrophobic Fragments
Pavelyev, Roman S.; Zaripova, Yulia F.; Yarkovoi, Vladimir V.; Vinogradova, Svetlana S.; Razhabov, Sherzod; Khayarov, Khasan R.; Nazarychev, Sergei A.; Stoporev, Andrey S.; Mendgaziev, Rais I.; Semenov, Anton P.; Valiullin, Lenar R.; Varfolomeev, Mikhail A.; Kelland, Malcolm Andrew (Peer reviewed; Journal article, 2020-12)The design of new dual-function inhibitors simultaneously preventing hydrate formation and corrosion is a relevant issue for the oil and gas industry. The structure-property relationship for a promising class of hybrid ... -
Phosphonated Iminodisuccinates-A Calcite Scale Inhibitor with Excellent Biodegradability
Ganguly, Sumit; Tungesvik, Simen; Kelland, Malcolm Andrew (Peer reviewed; Journal article, 2023-01)Scale inhibitors are an extremely important chemical in upstream oil and gas field operations and water treatment industries. These inhibitors prevent nucleation and/or crystal growth of scales such as calcite and barite. ... -
Phosphonated Lower-Molecular-Weight Polyethyleneimines as Oilfield Scale Inhibitors: An Experimental and Theoretical Study
Mady, Mohamed Fawzy Hamed Attia; Karaly, Ali H.; Abdel-Azeim, Safwat; Hussein, Ibnelwaleed A.; Kelland, Malcolm Andrew; Younis, Ahmed (Peer reviewed; Journal article, 2022)For many years, amino methylenephosphonate (-CH2-N-PO3H2)-based scale inhibitors (SIs) have been deployed for preventing various scales in the oil and gas industry, particularly for squeeze treatment applications. However, ... -
Phosphonated Polyetheramine-Coated Superparamagnetic Iron Oxide Nanoparticles for Inhibition of Oilfield Scale
Mady, Mohamed Fawzy Hamed Attia; Alkaraly, Ali Hasan Saber; Kelland, Malcolm Andrew (Peer reviewed; Journal article, 2023)Oilfield scale is one of the significant problems in hydrocarbon production in the oil and gas industry. Many research groups have attempted to develop greener chemicals to meet environmental regulations. Magnetic nanoparticles ... -
Powerful Synergy of Acetylenic Diol Surfactants with Kinetic Hydrate Inhibitor Polymers - Choosing the Correct Synergist Aqueous Solubility
Kelland, Malcolm Andrew; Dirdal, Erik Gisle (Peer reviewed; Journal article, 2021-09)The performance of injected kinetic hydrate inhibitor (KHI) polymer solutions can be boosted considerably by judicious choice of the polymer solvent system. We report the excellent KHI synergism of the low-foaming acetylenic ... -
Pushing the Known Performance Envelope of Kinetic Hydrate Inhibitors - Powerful Synergy of Trialkylamine Oxides with Acrylamide-based Polymers
Ghosh, Radhakanta; Kelland, Malcolm Andrew (Peer reviewed; Journal article, 2021-12)Poly(N-isopropyl methacrylamide) (PNIPMAm) and copolymers are a class of commercially used kinetic hydrate inhibitors (KHIs) for deployment in oil and gas field production flow lines. Here, we report improvements of the ... -
Reliability and Performance of Vinyl Lactam-Based Kinetic Hydrate Inhibitor Polymers after Treatment under a Range of Conditions
Kelland, Malcolm Andrew; Zhang, Qian; Dirdal, Erik Gisle; Mady, Mohamed Fawzy Hamed Attia (Peer reviewed; Journal article, 2021)Well-known kinetic hydrate inhibitors (KHIs) such as poly(N-vinylcaprolactam) (PVCap), poly(N-vinylpyrrolidone) (PVP), and 1:1 N-vinylcaprolactam:N-vinylpyrrolidone (VCap:VP) copolymer have been subjected to a range of ... -
Review of Nanotechnology Impacts on Oilfield Scale Management
Mady, Mohamed Fawzy Hamed Attia; Kelland, Malcolm Andrew (Peer reviewed; Journal article, 2020)Nanotechnology has grown rapidly in both research and applications over the past two decades including in the upstream petroleum industry. A recent hot area for studying nanotechnology has been oilfield scale management. ... -
Solvent Synergists for Improved Kinetic Hydrate Inhibitor Performance of Poly(N-vinylcaprolactam)
Kelland, Malcolm Andrew; Dirdal, Erik Gisle; Ree, Lilian Helene Strand (Peer reviewed; Journal article, 2020)The synergetic effect of a range of different solvents on the kinetic hydrate inhibitor (KHI) performance of poly(N-vinylcaprolactam) (PVCap) has been investigated. The equipment used was a high-pressure (76 bar) rocking ... -
Synergistic Gas Hydrate and Corrosion Inhibition Using Maleic Anhydride: N-Isopropylmethacrylamide Copolymer and Small Thiols
Pomicpic, Janronel Calog; Kelland, Malcolm Andrew (Peer reviewed; Journal article, 2023)Kinetic gas hydrate inhibitors (KHIs) are often used in combination with film-forming corrosion inhibitors (CIs) in oilfield production flow lines. However, CIs can be antagonistic to KHI performance. In this study, maleic ... -
Synergy Effect Study of Poly(N-isoacrylamide) with Tetra Butyl Phosphonium Bromide on Methane Hydrate Formation
Seo, SeongDeok; Paik, Hyun-jong; Kang, KyungChan; Kelland, Malcolm Andrew; Lee, JuDong (Journal article, 2019)Natural gas hydrate plugging is one of the costly and challenging problems for the oil and gas industry, especially for subsea fields. One way to prevent gas hydrate formation at low cost is the use of low-dosage hydrate ... -
Synthesis and Antiscaling Evaluation of Novel Hydroxybisphosphonates for Oilfield Applications
Mady, Mohamed Fawzy Hamed Attia; Rehman, Abdur; Kelland, Malcolm Andrew (Peer reviewed; Journal article, 2021)Organophosphorous compounds are still widely used as potential scale inhibitors in the upstream oil and gas industry, particularly in squeeze treatments as they have good adsorption properties on rock and are easily ... -
Synthesis and Investigation of Polymers of 2‑Methacrylamido-caprolactam as Kinetic Hydrate Inhibitors
Dirdal, Erik Gisle; Kelland, Malcolm Andrew (Peer reviewed; Journal article, 2020-05)Poly(N-vinylcaprolactam) (PVCap) and related copolymers have been used as kinetic hydrate inhibitors (KHIs) for over 25 years to combat gas hydrate formation in oil and gas field production flow lines. The caprolactam ... -
Synthesis and Study of Modified Polyaspartic Acid Coupled Phosphonate and Sulfonate Moieties As Green Oilfield Scale Inhibitors
Mady, Mohamed Fawzy Hamed Attia; Rehman, Abdur; Kelland, Malcolm Andrew (Peer reviewed; Journal article, 2021)The petroleum industry has strived for several years to explore environmentally friendly scale inhibitors with no acute environmental impact. Well-known industrial biodegradable polyaspartic acid is widely used as a potent ... -
Toward Separation and Characterization of Asphaltene Acid and Base Fractions
Gharbi, Kheira; Benamara, Chahrazed; Benyounes, Khaled; Kelland, Malcolm Andrew (Peer reviewed; Journal article, 2021-08)Chemical inhibition of asphaltene deposition is considered a cost-effective way to prevent the harsh consequences of asphaltene instability in the produced crude. Thus, a careful screening of asphaltene inhibitors is crucial ...