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公开(公告)号：EP3510235B1
公开(公告)日：2020-08-12
申请号：EP17761423.7
申请日：2017-08-28
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公开(公告)号：EP3510235A1
公开(公告)日：2019-07-17
申请号：EP17761423.7
申请日：2017-08-28
摘要： A mobile offshore drilling unit is converted to provide drilling, completion and workover access to multiple dry tree wells from a drilling derrick to allow production and export of oil and gas from high pressure, high temperature reservoirs in deep offshore waters. Existing practice has been for the drilling derrick on a production platform supporting dry tree wells to be moved over a fixed well slot. The present invention provides a movable wellbay that supports multiple top-tensioned subsea well tieback risers, which may be positioned directly below the derrick's rotary table and/or beneath another operating device. The use of top-tensioned subsea well tieback risers supported by the movable wellbay allows the converted facility to drill, complete, maintain, improve and produce from subsea wells through dry trees.
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