In Australian HPHT environments, backup rings made from PEEK or PTFE prevent extrusion of primary seals under combined high pressure and temperature. These non-metallic backups support FFKM and HNBR elements in packer and liner hanger systems. Local manufacturing ensures precise tolerances for metric and API sizes, reducing failure risks in deep, hot wells across the country https://globalsealstech.com/rgd-resistance-and-hpht-seals/