07325 INVESTIGATION OF THE EROSION/CORROSION RESISTANCE OF A CHROMIUM NICKEL STEEL IN THE “AS DELIVERED” AND HEAT TREATED VERSION AT DIFFERENT TEMPERATURES AND SAND LOADS IN A MULTIPHASE CO2 ENVIRONMENT

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Product Number: 51300-07325-SG

ISBN: 07325 2007 CP

Author: Oliver Klein, Hans Hoffmeister, Jan Köhne, and Mathias Jung

Publication Date: 2007

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In a previous paper a new type of laboratory test facility was introduced, that enables experimental modeling of rotating and fixed pump components respective electrochemical and mechanical wear. This paper discusses the results of experiments conducted in order to investigate the effects of temperature, sand volume fractions and heat treatment of a forged chromium nickel steel on erosion/corrosion resistance. This steel is commonly used as screw material of twin screw pumps used in the oil and gas production industry. The steel was tested “as delivered” as well as in heat treated versions in order to examine the effect that a change of the microstructure has on the material’s wear. It will be shown, that one of the heat treated versions of the chromium nickel steel has a higher wear resistance at high sand volume fractions than the “as delivered” steel. This difference in wear resistance is not recorded at low sand loads where the corrosion is the prevailing factor for wear. As a result for the selection of twin screw pump materials in the oil and gas industry, the wear resistance of steel heat treatments will be discussed with respect to the hydrocarbon reservoir composition they will be exposed to.