Permanent production packer elements feature dual metal-to-rubber bonds and triple backup systems for lifelong isolation. Once set, they resist movement under thermal expansion and pressure reversal, making them the preferred choice for subsea tiebacks, deepwater wells, and high-value assets where intervention costs exceed millions of dollars. https://globalsealstech.com/product-category/oil-gas-seals/api-6a-wellhead-equipment-seals/