Blar i UiS Brage på forfatter "Dirdal, Erik Gisle"
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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 ... -
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, ... -
Establishment of new equipment for testing low dosage hydrate inhibitors
Dirdal, Erik Gisle (Masteroppgave/UIS-TN-IMN/2013;, Master thesis, 2013)Gas hydrate formation posses a notorious concern for the oil and gas industry, and it only gets bigger because of that the never-ending pursuit of oil and gas compels the industry into deeper and colder waters. Here gas ... -
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. ... -
Investigation of Lactam- Based Kinetic Hydrate Inhibitors and the Synergetic Effect of Solvents
Dirdal, Erik Gisle (PhD thesis UiS;, Doctoral thesis, 2022)Gas hydrate formation in flow lines is of notorious concern for the oil and gas industry, and it only gets bigger because of the never-ending pursuit of oil and gas compels the industry into deeper and colder waters. Gas ... -
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 ... -
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 ... -
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 ... -
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 ... -
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 ...