Well Control Technology in Deepwater Well

Well control in deepwater faces many challenges,such as low temperature at seabed,hydrate,a small margin between formation pore pressure and fracture pressure,small kick tolerance,the higher friction loss in choke line due to long pipe length,unconsolidated formation,etc.Considering these issues,this paper analyses the requirements and arrangement for well control equipment in deepwater drilling,and presents early kick detection method,well shut-in and killing method,procedure for trapped gas in BOP and riser,and prevention of hydrate from being formed.It can provide a good reference for deepwater drilling.