Blowout preventer (BOP) seals for wireline provide emergency shut-in capability. Ram-type BOPs feature elastomer-faced rams that close around slickline or e-line, creating a metal-to-metal backup if needed. Annular BOPs use spherical packers to seal variable diameters. Seals must withstand rapid closure and stripping operations without tearing. Materials include high-modulus elastomer... https://globalsealstech.com/product-category/oil-gas-seals/oil-free-lubricated-pump-seals/