A single drilling ship may be equipped with two drilling centers (12, 14), each capable of running risers (24, 40). Each drilling center has a set of tubulars stored for use in association with that drilling center, those tubulars including risers. However, the risers for one drilling center are of a smaller diameter than the risers for the other drilling center. In the event that a main drilling center drilled well fails, a relief well can then be drilled from the same ship using a secondary drilling center.
Dual drilling activity drilling ship
2015-10-08
Patent
Elektronische Ressource
Englisch