A cladding method for sealing a leak in a casing pipeline, borehole or well downhole

摘要

The present invention relates to a cladding method for sealing a leak (2) in a casing(3), a pipeline, a borehole, or a well downhole using a liner (1) having a tube (4)with a first diameter, a plurality of circumferential grooves (5), and a pluralityof sealing means (6) in the grooves extending beyond the first diameter. The claddingmethod comprises the steps of fastening the liner in a fastening means (9) of anexpansion tool, inserting the liner having a first part (8) and a second part (10)into the casing (3) outside the teak (2), positioning an expansion means of theexpansion tool at the first part of the liner, expanding the first part of the lineruntil the sealing means in the grooves of the first part of the liner are pressedagainst the casing and fasten the first part to the casing, releasing the linerso that the liner is free of the tool and the liner is held in place by the sealingmeans in the first part of the liner, and expanding all the way through the linerby expanding also the second part of the liner to abut the casing for sealing theleak.