| 摘要 |
Method for laying a pipeline onto a seabed from a lay barge, the pipeline having an inner corrosion proof metallic cladding that is closely fitted wi th metallic contact to an outer pipe material that is less corrosion proof, distinguished in that a) a section of the pipeline is reeled onto a pipe lay ing drum, whilst an overpressure of 5-25 bar is maintained within the sectio n by means of a pressurised fluid inside the section, b) a further pipeline section is joined to the section already reeled onto the pipe laying drum, w hilst the pipeline is motionless without mechanical movement, as the overpre ssure can be relieved as long as the sections are without mechanical movemen t, c) an overpressure of 5-25 bar is applied within the sections and the fur ther section is reeled onto the pipe laying drum, d) several sections are jo ined together and reeled onto one or several pipe laying drums by repeating step b) and c) until the predetermined pipeline length is achieved, e) the p ipeline is laid from the lay barge onto the seabed using conventional method , whilst an overpressure of 5-25 bar is maintained within the pipeline by me ans of a pressurised fluid until the pipeline is correctly placed onto the s eabed.
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