| 摘要 |
The method of the invention comprises inserting into the well or the piping to be cased, a tube (1) including tube sections previously connected end to end, proceeding with the radial expansion of the tube using an inflatable bladder (3) so that the wall thereof bears against that (C) of the well or the piping; wherein the method is characterized in that the expansion is achieved not on the entire length of the tube but only at certain areas (4) thereof which are spaced from each other by non-expanded portions (5), so that the total length of the expanded areas (4) is substantially smaller than the total length of the non-expanded areas (5), the number of expanded areas (4) being at least equal to three. The invention can be used in the field of water or crude oil production. |
