公开(公告)号：WO2019123008A3

公开(公告)日：2019-06-27

申请号：PCT/IB2018/001562

申请日：2018-12-17

申请人： ACERGY FRANCE SAS

发明人： LODEHO, Olivier ,  WEGNER, Alexis

IPC分类号： F16L59/14 ,  E21B36/00 ,  E21B43/01 ,  E21B17/01 ,  F16L59/07 ,  F16L9/18

摘要： A pipe-in-pipe section (10) comprises an inner pipe (12) spaced within an outer pipe (14) to define an annulus (16) between the inner and outer pipes. The annulus contains a solid insulating material (18), which may be a microporous aerogel, and an inert gas such as krypton at near-atmospheric pressure.

公开(公告)号：WO2020188363A1

公开(公告)日：2020-09-24

申请号：PCT/IB2020/000285

申请日：2020-03-16

申请人： ACERGY FRANCE SAS

发明人： WEGNER, Alexis ,  BOULLIAT, Vincent

IPC分类号： F16L53/32 ,  F16L53/37 ,  F16L59/14 ,  E21B43/01

摘要： A heated subsea pipeline comprises a direct electrical heating (DEH) system (10) that heats a central major portion of the pipeline. Supplementary heating systems (42) extend along respective end portions (38) of the pipeline, longitudinally outboard of the central portion heated by the DEH system. A flow of heating fluid is circulated along the end portions, and may be circulated through an underwater vehicle that pumps and heats the flow.