公开(公告)号：WO2008072970A8

公开(公告)日：2009-08-13

申请号：PCT/NO2007000427

申请日：2007-11-30

Applicant: STATOIL ASA ,  ENDAL GEIR ,  LEVOLD ERIK ,  ILSTAD HAAVAR

Inventor： ENDAL GEIR ,  LEVOLD ERIK ,  ILSTAD HAAVAR

IPC: E21B43/01 ,  B63B35/03 ,  F16L1/12

CPC classification number: F16L1/18 ,  B63B35/03 ,  F16L1/161 ,  F16L1/203 ,  F16L58/08

Abstract: 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 with 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 laying drum, whilst an overpressure of 5-25 bar is maintained within the section 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, whilst the pipeline is motionless without mechanical movement, as the overpressure can be relieved as long as the sections are without mechanical movement, c) an overpressure of 5-25 bar is applied within the sections and the further section is reeled onto the pipe laying drum, d) several sections are joined 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 pipeline 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 means of a pressurised fluid until the pipeline is correctly placed onto the seabed.

Abstract translation: 将管道铺设在来自驳船的海床上的方法，该管道具有内部防腐蚀金属包层，其与耐腐蚀性较差的外管材料紧密配合金属接触，区别在于：a）管道的一部分 被卷绕在铺管滚筒上，同时在该部分内通过加压流体在该部分内保持5-25巴的超压力，b）另外的管道部分连接到已经卷绕在铺管滚筒上的部分， 而管道在没有机械运动的情况下静止不动，因为只要部分没有机械运动，超压可以减轻，c）在部分内施加5-25bar的过压，并且另一部分被卷绕到铺管滚筒 d）通过重复步骤b）和c）直到达到预定的管道长度，将几个部分连接在一起并卷绕到一个或多个铺管滚筒上，e）铺设管道 使用常规方法从驳船运送到海床上，同时通过加压流体在管道内保持5-25巴的超压，直到管道正确地放置在海床上。