Patent ID: 6102124
Filing Date: 2000-08-15
Classification: E21B

Abstract:
A subsea well arrangement for deep sea operations comprising,a christmas tree (400) having valves controlled by hydraulic actuators (1000),electro-hydraulic control pod (300) having hydraulic lines (30') extending from said control pod (300) directly to said hydraulic actuators (1000) on said christmas tree, said control pod (300) having an electric input junction (380) and a hydraulic input junction (377),a remote production platform (80) connected in a production mode to said hydraulic input junction (377) by means of a production hydraulic umbilical (60) and to said electric input junction (380) by means of an electric umbilical (62), anda workover riser arrangement connected in a workover mode between said christmas tree (400) and a workover vessel (200), said workover riser arrangement having electric (E) and hydraulic (H) umbilicals from said vessel which terminate in a flying lead hydraulic umbilical (376) and a flying lead electric umbilical (378) at said christmas tree (400),wherein, in a workover mode, said production hydraulic umbilical (60) and said production electric umbilical (62) are disconnected respectively from said hydraulic input junction (377) and said electric input junction (380), and said flying lead hydraulic umbilical (376) and said flying lead electric umbilical (378) are connected respectively to said hydraulic input junction (377) and said electric input junction (380).