公开(公告)号：US10513896B2

公开(公告)日：2019-12-24

申请号：US15525782

申请日：2015-11-09

Applicant: National Oilwell Varco Denmark I/S

Inventor： Jonas Gudme ,  Adam Rubin ,  Marie Haahr

IPC: E21B17/01 ,  E21B19/22 ,  C23F13/00 ,  F16L58/00 ,  F16L11/08 ,  F16L1/15 ,  F16L11/20 ,  F16L11/04

Abstract: The present invention relates to a method of installing an unbonded flexible pipe with a bore for transportation of fluid wherein the unbonded flexible pipe comprises an outer sheath, an inner sealing sheath inside the outer polymer sheath, an annulus between said outer sheath and said inner sealing sheath and at least one metallic armor layer comprising iron located in said annulus, wherein the method comprises filling at least a part of the annulus with a corrosion promoting liquid before or after installing the unbonded flexible pipe between a first installation and a second installation.

公开(公告)号：US20180298705A1

公开(公告)日：2018-10-18

申请号：US15525782

申请日：2015-11-09

Applicant: National Oilwell Varco Denmark I/S

Inventor： Jonas Gudme ,  Adam Rubin ,  Marie Haahr

IPC: E21B19/22 ,  F16L1/15 ,  F16L58/00 ,  F16L11/08 ,  E21B17/01

Abstract: The present invention relates to a method of installing an unbonded flexible pipe with a bore for transportation of fluid wherein the unbonded flexible pipe comprises an outer sheath, an inner sealing sheath inside the outer polymer sheath, an annulus between said outer sheath and said inner sealing sheath and at least one metallic armor layer comprising iron located in said annulus, wherein the method comprises filling at least a part of the annulus with a corrosion promoting liquid before or after installing the unbonded flexible pipe between a first installation and a second installation.