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The goal of this work is to determine erosion-corrosion damage caused by liquid impact in the oil and gas industry.
The goal of this work is to determine erosion-corrosion damage caused by liquid impact in oiland gas industry. The American Petroleum Institute Recommended Practice 14E (API RP 14E)guide describes a method for calculating an erosional velocity for clean service. Some authorsbelieve that the basis for API RP 14E is erosion due to liquid droplet impacts. The API correlationis very simple and as noted in the literature does not contain many factors contributing to erosion-corrosion. A series of experimental data was collected for specimens from oil-field materialsimpacting liquid jets in a test configuration that conforms to American Society for Testing andMaterials (ASTM) standard G73-10. Specimens were mounted on a rotating disk and hit theliquid jet periodically. The tests were done with two solutions aerated 3% NaCl brine and tapwater and two impact velocities 52 and 26 m/s. It has been observed that the weight loss of lowchromium alloys was higher than the weight loss of corrosion resistant alloysespecially when brine is used as theerodent solution. The weight loss is then converted to Erosion-Corrosion Ratio which is definedas the ratio of volumetric loss of the specimen to the total volume of the fluid that is impinged. Acorrelation has been proposed based on the erosion correlation from ASTM G73-10 to calculatethe erosion ratio of the materials at different configurations and verified with experimental fromliterature. The calculated threshold velocity using the data and method developed in this study arecompared for several different flow conditions with the API RP 14 E. It is shown that the trend ofthe erosional velocity calculated by the API guideline does not correlate with erosion-corrosioncaused by liquid impact.
Key words: conference papers, conference papers 2015, Erosion, Corrosion, Liquid Impact, Oilfield Materials
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An elbow leak was encountered after 3 years of operation of a carbon steel flow line from an artificial lift (rod pump) well. Methods for prevention of similar failure are discussed in terms of design and inhibition.