Test liner integrity on same trip as displacement

These specialized tools are run in the displacement string to negatively or positively test one or more liners or liner packers all the way to the shoe track. Liner-top test tools scrape the casing to below the integral packer setting area. In addition, they are used to dress off the polished-bore receptacle (PBR) at the top of the liner. They permit access to the top of the shoe for complete wellbore displacement.