Sampling tool seals capture pristine formation fluids. PTFE-lined chambers prevent contamination. Dual closure valves trap samples. Pressure compensation avoids implosion. Wireline corrosion seals monitor casing integrity. Sacrificial anodes integrate with seal bodies. Cathodic protection extends tool life. Data logs track corrosion rates. https://globalsealstech.com/product-category/oil-gas-seals/oil-free-lubricated-pump-seals/