Delayed Action Lead Seal Double Slip Liner Hanger

This is simply the double slip version of the delayed action lead seal liner hanger. It operates in the same way as the single slip version with the same unique design features. As with all of the lead seal liner hangers the seal is rated at approximately 1,000 psi and the double slip version is recommended for liners heavier than 80,000 pounds. Delayed action liner hangers tend to be more popular in cementing operations where it is preferred to set the seal after the cementing operation. Also a higher pressure seal that won’t wash out with fluid during circulation is desirable. For that reason, some type of seal other than lead is required, usually some type of rubber. Neoprene rubber and EPDM rubber are common. Viton or aflast are other types of high temperature rubber seals with different properties but also tend to be expensive alternatives. All of these seals have pressure ratings of about 3,000 psi.

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