With the aim of understand the performance of elastomeric materials used in progressive cavities pumps to face operational conditions presented in Venezuelan oil wells, it was carried out a compatibility study of two elastomers with low and high nitrile content in environments such as H2S, CO2 and different crude oils to simulate real conditions in the lab. This study is based in the evaluation of the mechanical behavior of the elastomers before and after being in contact with different fluid and gases. NACE and ASTM standards were used to evaluate mechanical properties of the elastomers such as yield strength, elongation at break, Shore A hardness, permanent deformation and volumetric swelling. Characterization techniques such as thermal gravimetric analysis (TGA) and scanning electron microscopy (SEM) were employed. The effect of crude oils, hydrogen sulfide (H2S) and carbon dioxide (CO2) in the elastomer helps to predict the performance behavior of the material when it is in service. Upon completion of the different evaluation techniques, it was observed how different fluids conditions (Temperature, H2S and CO2 concentration) affect the mechanical properties of the elastomers studied. It is recommended to continue the evaluation with different elastomers which provide a range of support to various aggressive environments to which the material is subjected during its operation.

Subject
Materials, Deformation, Hydrogen concentration, Micrography, Mechanical properties, Fluids, Swelling, Elongation, Crude, Elastomers, Hardness, Aging, Oil
Keywords:
Progressive Cavity Pump, Elastomers, Compatibility, Crude Oil
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2016
Association for Materials Protection and Performance (AMPP)
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