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• W4297918744 abstract "Objectives/Scope Anti-agglomerant low dose hydrate inhibitors (AA-LDHIs) have the potential to exhibit corrosion inhibition due to their phase-boundary association and surfactant properties as well as containing similar functional groups as corrosion inhibitors (CI). However, it is often found that AA-LDHI molecules, on their own, do not possess the corrosion inhibition efficacy to meet commonly used industry standard corrosion rate criteria of less than 4 mpy general corrosion and minimal localized corrosion, even when dosed at typical AA-LDHI treatment rates (at the percentage level). For offshore applications, where an operator may have limited umbilicals for production chemical delivery and are conscious of capital expenditure, a combination chemical product would be the preferred option. In the search for such a single umbilical combination product to provide both corrosion and hydrate protection, a highly effective AA-LDHI/CI combination product was formulated. Methods, Procedures, Process The newly developed AA-LDHI/CI product was first evaluated in the laboratory under field simulated environments: rotating cage autoclave (RCA) to test corrosion inhibitor performance and visual sapphire hydrate rocking cells to test anti-agglomerant performance before being taken to the field. Results, Observations, Conclusions The corrosion inhibitor performance testing was conducted under sweet conditions using RCA at a temperature of 158 °F and a shear rate of 40 pascals. The post-test coupons were further evaluated for pitting corrosion performance using Vertical Scan Interferometer and coupon surface features were measured. After a 7-day test, the AA-LDHI/CI reduced the general corrosion rate to &lt;4mpy whilst localized corrosion features were no greater than what was already present on the surface before exposure. The product was also tested for AA-LDHI performance utilizing visual sapphire hydrate rocking cells at 2,000 psi and 40 °F under shut-in/restart conditions which showed no impacts on performance when compared with the AA-LDHI chemistry by itself at the same dosage. Novel/Additive Information The paper describes the development and laboratory testing of new AA-LDHI/CI combination products that showed exceptional corrosion inhibition performance while also maintaining hydrate inhibition metrics with no change to secondary properties and with positive sustainability impacts. After laboratory development and testing, the new product was then field deployed. Preliminary data from an ongoing field trial is also shared." @default.
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• W4297918744 date "2022-09-26" @default.
• W4297918744 modified "2023-09-30" @default.
• W4297918744 title "Investigation of Corrosion Inhibitor Actives for Anti-Agglomerant Low Dose Hydrate Inhibitor/Corrosion Inhibitor (AA/CI) Combo Products" @default.
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• W4297918744 doi "https://doi.org/10.2118/210234-ms" @default.
• W4297918744 hasPublicationYear "2022" @default.
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