Figure 1. Schematic of an ACORK installed in a reentry cone. The ACORK features downhole external casing packers to seal off zones and screened sampling sections mounted on the outside of the casing. The screened sections are connected by hydraulic sampling tubing to the T-handle valves and ports (valve manifold) in the ACORK head. The valve manifold allows pressure recording and fluid sampling. The ACORK head sits above the reentry cone to allow the ROVs/submersibles access to sample and download data.