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99592 CORROSION BEHAVIOR OF CRA’S IN HIGH DENSITY PACKER FLUIDS AT HIGH TEMPERATURE

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Product Number: 51300-99592-SG
ISBN: 99592 1999 CP
Author: L. Scoppio, M. Barteri, T. Cheldi, M. Ke, S. Massi
Industry: Chemical Inhibitors
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Results from an experimental investigation carried out in high density brine packer fluids are presented. Different variables were examined, namely temperature, time of exposure, chemical inhibition and brine composition and density. Tests to compare the performance of different classes of stainless steels were carried out by autoclave exposure under different deareated brines solutions: NaCl/NaBr, CaCI2/CaBr2 and CaBr2/ZnBr2, CaCl2, CaCI2/CaBr2/ZnBr2. General corrosion, localized corrosion (pitting and crevice), galvanic corrosion and resistance to environmental cracking were evaluated both in absence of corrosion inhibitor and with the addition of two different commercial inhibitors. Duplex steels were very resistant to the localized corrosion, although pitting and crevice were present in some combination of brine and temperature. The martensitic steel was very sensitive to the general and the localized corrosion... Keywords: Martensitic stainless steel, Duplex stainless steel, Packer fluids, Completion fluids, Deep wells, Brines, Localized corrosion, Galvanic corrosion, Stress Corrosion Cracking.
Results from an experimental investigation carried out in high density brine packer fluids are presented. Different variables were examined, namely temperature, time of exposure, chemical inhibition and brine composition and density. Tests to compare the performance of different classes of stainless steels were carried out by autoclave exposure under different deareated brines solutions: NaCl/NaBr, CaCI2/CaBr2 and CaBr2/ZnBr2, CaCl2, CaCI2/CaBr2/ZnBr2. General corrosion, localized corrosion (pitting and crevice), galvanic corrosion and resistance to environmental cracking were evaluated both in absence of corrosion inhibitor and with the addition of two different commercial inhibitors. Duplex steels were very resistant to the localized corrosion, although pitting and crevice were present in some combination of brine and temperature. The martensitic steel was very sensitive to the general and the localized corrosion... Keywords: Martensitic stainless steel, Duplex stainless steel, Packer fluids, Completion fluids, Deep wells, Brines, Localized corrosion, Galvanic corrosion, Stress Corrosion Cracking.
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