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Corrosion tests have been carried out in dependence of important application parameters, applying electrochemical methods, beaker tests and long term tests in cooling circuit simulating devices. The results show excellent efficiency and significant synergies between the new substance and other inhibitors.
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Chemical treatment of reservoir fluids within the wellbore is essential for the control of associated corrosion and scale deposition. The Wafra Risk Assessment was developed with the Likelihood of Failure (LoF) based on historical corrosion well workover failures and the Consequence of Failure (CoF) directly tied to oil daily oil production.
This paper presents the latest laboratory results on iron sulfide dissolver evaluation. The recently developed dissolvers were studied for their dissolving powers using iron sulfide scale solids and the corrosion rate to mild steel at elevated temperature. Based on these results, the technical gaps and future developments for iron sulfide dissolvers are discussed.
Biocorrosion or microbiologically influenced corrosion (MIC) is a major problem in the oil and gas industry. Biofilms are the culprits of MIC. In this work, D-amino acids were used to enhance two biocides, alkyldimethylbenzylammonium chloride (ADBAC) and tributyl tetradecyl phosphonium chloride (TTPC), to treat a field biofilm consortium on C1018 carbon steel coupons.
Plastic packaging films can be readily impregnated with Vapor Phase Corrosion Inhibitors (VCIs) to provide corrosion protection, in addition to the basic physical barrier afforded by the plastic. VCI-containing plastic films are recyclable. This paper will discuss the benefits of using in-house recycling lines. Improved environmental profile. Better quality. Cost saving.
Experiments were conducted at a range of temperatures (80 to 170°C) and at vapor pressure at 80°C to 3000 psi at 170°C to review the impact of temperature (and pressure) on three dissolvers. This paper shows that at elevated temperature the classic alkali sulphate dissolver (DTPA) dissolution performance declines significantly at 170°C.
In a bioinspired approach, we have used (as scale inhibitors) several non-toxic, “green” polyelectrolytes that possess “active” chemical moieties, capable of stabilizing silicic acid, for a prolonged time period. These additives include either neutral or charged polymers that stabilize two soluble forms of “Si”, silicic and disilicic acids.
This study examines the effectiveness of various types of corrosion inhibitors in a waterborne styrenated acrylic coating, based on salt fog results, (ASTM B117). All of the samples were made using high speed dispersion.
An analytical method using fluorescence spectroscopy has been developed to measure inhibitor concentration. It enables dye transfer methods and promises a greater degree of accuracy. The procedure can be performed in the laboratory or at the well site, and individual analysis can be done quickly.
An operator in North America discovered an internal corrosion failure in a wet gas system directly below the point of injection of a water-soluble corrosion inhibitor (CI). Tests using low shear rotating cage autoclaves and a dual autoclave system were performed as a corrosion screening method.
Vapor corrosion inhibitor (VCI) as an alternative for corrosion control of underside tank bottom. A specified volume of VCI was applied through a leak detector port 24-inch (60.96 cm) from the edge of the tank bottom plate, towards the center. As expected, the initial corrosion rates at the different locations differ and tend to decrease with time.
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We have identified a class of inhibitory molecules that abrogate sulfidogenesis in oilfield produced fluids. Bottle tests and laboratory-scale bioreactors to mimic field conditions, found that very low doses of two versions of this class of compounds were found to effectively prevent H2S generation.