公开(公告)号：US10989331B2

公开(公告)日：2021-04-27

申请号：US16337541

申请日：2017-09-28

Applicant: SAIPEM S.A.

Inventor： Vincent Cocault-Duverger ,  Antoine Jardin ,  Vincent Chojnacki

IPC: F16L1/15 ,  F16L1/20 ,  F16L53/34 ,  F16L9/19

Abstract: A method of installing at sea a double-walled preheated undersea pipe for transporting fluids, wherein for each new pipe section to be assembled to a pipe that is already installed at sea: the method involves preheating the inner wall unit element inside the outer wall unit element of the new pipe section; assembling the inner wall unit elements of the new pipe section to the inner wall of the pipe that is already installed at sea; assembling the outer wall unit element of the new pipe section to the outer wall of the pipe that is already installed at sea; lowering the new pipe section into the sea; and repeating the above for other new pipe sections to be assembled so as to prestress the pipe while it is being installed at sea.