Figure 1. Schematic of a CORK installed in a reentry cone, which has 16 in. and 10 in. casing set. The CORK data logger and fluid sampling ports extend above the top of the reentry funnel, and a platform is free-fall deployed to the top of the funnel to provide access for submersibles/ROVs. The CORK seals the 10 in. casing. An optional third-party instrument string can be installed.