| 摘要 |
PCT No. PCT/GB96/00852 Sec. 371 Date Dec. 29, 1997 Sec. 102(e) Date Dec. 29, 1997 PCT Filed Apr. 9, 1996 PCT Pub. No. WO96/31727 PCT Pub. Date Oct. 10, 1996A method of re-lining a main pipeline having at least one transversely extending pipe connected thereto via a generally annular connection region includes applying an internal lining to the inner wall of a length of the main pipeline and which overlies the entrance to the transversely extending pipe. A hole is then formed in the lining so as to expose the entrance. A re-lining assembly is introduced into the pipe from an end thereof remote from the entrance, the assembly comprising a tubular web of resin-permeated material within an elastomeric membrane which is everted by application of fluid pressure to the assembly so as to introduce the assembly into the pipe and so that the now externally located tubular web projects into the main pipeline. Fluid pressure is further applied to the assembly so that the membrane causes the projecting end of the tubular web to flare or deform outwardly and thereby overlie the connection region. Inflating a packer which is located in the main pipeline adjacent to the transversely extending pipe engages with the flared projecting end of the tubular web to press the end into engagement with the portion of the wall of the main pipeline adjacent to the connection region. |
