COILED TUBING MODULE FOR RISERLESS SUBSEA WELL INTERVENTION SYSTEM

摘要

A method for riserless intervention of a subsea well includes connecting an intervention assembly (300) to a bottom hole assembly (BHA). The BHA is connected to coiled tubing (460t). The method further includes lowering the intervention assembly to a blowout preventer (BOP) fastened to a subsea production tree (50) using an injector (410) of a support vessel (400) engaged with the coiled tubing; fastening the intervention assembly to the BOP; slacking the coiled tubing using the vessel injector; engaging a stripper (320) of the intervention assembly with the coiled tubing; and driving the BHA through the tree and into a wellbore (10) using a subsea injector (325) of the intervention assembly while synchronizing both injectors to maintain the slack (470) in the coiled tubing.