| Popis: |
The article discusses the failure analysis of the SDP-89 drill pipe nipple and provides an assessment of the material properties. The results of the analysis of the chemical composition and metallographic studies, as well as the mechanical properties of the material of the nipple parts of the drill pipe nipple are presented. As a result of measuring the hardness and performed mechanical tests, the heterogeneity of the mechanical properties over the section was established. As a result, it was found that the main cause of destruction is the microstructure inhomogeneity caused by the violation of the heat treatment. |
