Importance

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Abstract

A method of repairing a pipeline and apparatus for use in such a method is disclosed where a sheet like repair material is set in position within the pipeline with the use of a settable substance, the repair material being carried into the pipeline on a core member (4) that carries an inflatable member, the inflatable member (1) extending axially along the core member (4) and at least partially around the core member (4) to define an annular or part annular enclosed space (9, 10) extending along the core member (4), means (8, 11) being provided to inflate or deflate the inflatable member when in position in the pipeline, the inflatable member further having an outer flexible surface portion fixed only at one axial end to the core member, the inflatable member (1) acting when inflated to press the repair material against the pipeline wall to be repaired with the inflatable member (1) being thereafter deflated with the apparatus being withdrawn from the pipeline in a direction whereby the outer wall portion of the inflatable member (1) is progressively everted and peeled away from the repair material.

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First Claim