Oceaneering's decommissioning specialists, including Perigon, deployed an existing CST in a novel way. The CST was placed inside a deployment stinger that was attached to a deployment hose.
This assembly was run down to the setting depth, and water was pumped down the hose and into the stinger, which pumped out the CST tool, allowing it to open and set at the required depth.
The tool was easy to use, required no additional equipment or personnel offshore, and was effective in setting the environmental cement plug in the well.
The operation was completed without the use of divers, guide wires, or explosives, and Oceaneering maintained its 100% success rate for severing wellheads.
