Seals are tested according to standards such as API 6A Appendix F, ISO 23936-2, NORSOK M-710, and TOTAL GS EP PVV 142. These qualifications involve aging in harsh fluids (e.g., brine, H2S, CO2, methanol, amine inhibitors) at elevated temperatures and multiple pressure cycles to simulate real-world conditions. https://globalsealstech.com/product-category/oil-gas-seals/downhole-completion-tools-seals/