| 摘要 |
<p>A method and a device for plugging a submerged well (1) in which a wellhead valve (24) is arranged at the seabed (2), the method including: - moving a perforation tool (40) into the well (1) and perforating a first perforation (42) in the wall of an inner casing (10); - perforating a second perforation (44) in the wall of the inner casing (10) at a considerable distance from the first perforation (42); - filling a casting substance into at least a portion of an annulus (52) between the first perforation (42) and the second perforation (44), and the method further including: - placing a connection housing (22) between the well (1) and the wellhead valve (24); - performing the first perforation (42) through the pipe wall of at least the inner casing (10) at a height level at which the perforation enables access to the wall of a borehole (16); - setting a packer (48) in the inner casing (10) between the two perforations (42, 44); - connecting a stinger (46) to the connection housing (22), the stinger (46) communicating with the first perforation (42); - circulating fluid through an annulus (52) located outside the inner casing (10), between the first perforation (42) and the second perforation (44) to clean the annulus (52); and - filling a casting substance (54) into the inner casing (10) below the packer (48) and at least into a portion of the annulus (52) between the first perforation (42) and the second perforation (44).</p> |
