O-rings are common static seals due to their simplicity, flexibility, and robust sealing capabilities. Dynamic seals, like packings or wiper seals, are utilized in places with continuous cable movement. Their design emphasizes minimizing friction while preventing fluid or gas egress, which is particularly essential for moving wireline operations under pressure.​ https://globalsealstech.com/product-category/oil-gas-seals/oil-free-lubricated-pump-seals/