Seal stack configurations combine multiple sealing elements—primary, secondary, and backups—in series or tandem arrangements. This redundancy provides enhanced reliability for critical tools like subsurface safety valves, where single-point failure is unacceptable under API 14A and ISO 10423 requirements. Low-temperature performance is essential for seals deployed in arctic or deepwa... https://globalsealstech.com/product-category/oil-gas-seals/downhole-completion-tools-seals/