Patent ID: 8894327

Claim:
A method for reeling a pipeline while extending the pipeline with an additional pipeline section, the pipeline having an inner corrosion-resistant metallic liner that is tightly fitted within the pipeline, wherein, to minimize or avoid wrinkling of the liner during the reeling, the method comprises the following steps: providing a fluid connection between the pipeline and pumping/pressurizing equipment via a manifold mounted on a flange of a pipe laying reel; internally pressurizing a length of the pipeline in a two-stage pressurizing process comprising: a first stage comprising filling the length of the pipeline with fluid, the fluid being delivered at a first pressure in the range of 5 to 25 bar absolute; and comprising further pressurizing the fluid to raise the fluid pressure from the first pressure to a second pressure of greater than 25 bar absolute; connecting a leading end of the pipeline to a reel via the manifold; reeling the length of the pipeline into the reel while pressurized to the second pressure; depressurizing the length of the pipeline; and joining a further pipeline section to a trailing end of the length of the pipeline.