| Autor: |
S.P. Kuleshov, E. O. Timashev, A.R. Garifullin, V.V. Nosov, M.G. Volkov, A.I. Voloshin, V. A. Dokichev, S.A. Grabovskii, A.R. Brot |
| Rok vydání: |
2021 |
| Předmět: |
|
| Zdroj: |
Petroleum Engineering. 19:111 |
| ISSN: |
2073-0128 |
| Popis: |
To ensure the production of high-viscosity oil, progressing cavity pumps with a surface or submersible drive are widely used. The reliability and efficiency of progressing cavity pumps significantly depends on the elastomers used, which are mainly used as butadiene-nitrile rubbers. In the article, the thermal degradation of a number of butadiene-nitrile elastomers is investigated by the method of dynamic thermogravimetric analysis. The kinetic features of the destruction of elastomers in inert and oxidizing (air) media are established. The temperature corresponding to 5 % of the mass loss of the samples in the context of the destruction under consideration is defined as one of the parameters corresponding to the thermal stability of the elastomers. The process of mass loss of an elastomer under conditions of linear temperature increase includes 3 stages, the temperature ranges of which are related to the conditions of thermal degradation and the content of nitrile functional groups in the elastomer. The parameters of the Arrhenius equation of the thermodestruction stages are determined, which can also be used as parameters characterizing the stability of elastomers. It is shown that air oxygen has a more destructive effect on elastomers than CO2. Based on the results obtained and the analysis of the literature data, conclusions are drawn about the mechanism of destruction. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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