20130319671 | Method and Device for Plugging of a Subsea Well - A method and a device are for plugging a submerged well in which a wellhead valve is arranged at the seabed. The method includes: moving a perforation tool into the well and perforating a first perforation in the wall of an inner casing; perforating a second perforation in the wall of the inner casing at a considerable distance from the first perforation; filling a casting substance into at least a portion of an annulus between the first perforation and the second perforation; placing a connection housing between the well and the wellhead valve; performing the first perforation through the pipe wall of at least the inner casing at a height level at which the perforation enables access to the wall of a borehole; setting a packer in the inner casing between the two perforations; connecting a stinger to the connection housing, the stinger communicating with the first perforation; circulating fluid through an annulus located outside the inner casing, between the first perforation and the second perforation to clean the annulus; and filling a casting substance into the inner casing below the packer and at least into a portion of the annulus between the first perforation and the second perforation. | 12-05-2013 |