Grout free fiber enhanced composite liner steel tube for ccus and water injection

Patent metadata

Field	Value
Publication number	US-2025367911-A1
Application number	US-202418680313-A
Country	US
Kind code	A1
Filing date	May 31, 2024
Priority date	May 31, 2024
Publication date	Dec 4, 2025
Grant date	—

Abstract

A composite liner inside a steel tube comprises a glass-reinforced epoxy resin system and an anti-corrosion coating or plating on an inner diameter of the steel tubes. The glass-reinforced epoxy resin may form the composite liner attached to the inner diameter of the steel tube. The anti-corrosion coating or plating on an inner diameter of the steel tubes with low gas permeability may serve as a more effective barrier than a grout layer and enhancing performance. The anti-corrosive coating or plating is sandwiched between the glass-reinforced epoxy resin system and the steel tube.

First claim

We claim:

1 . A composite liner inside a steel tube comprising:
a glass-reinforced epoxy resin system forming the composite liner attached to the inner diameter of the steel tube; and an anti-corrosion coating or plating on an inner diameter of the steel tubes with low gas permeability serving as a more effective barrier than a grout layer and enhancing performance, wherein the anti-corrosive coating or plating is sandwiched between the glass-reinforced epoxy resin system and the steel tube.

2 . The composite liner of claim 1 , wherein the anti-corrosion coating or metal plating used in the composite liner has a thickness ranging between about 2 to about 10 mills in thickness.

3 . The composite liner of claim 1 , wherein the glass-reinforced epoxy resin system is about 2 to 4 mm thick.

4 . The composite liner of claim 1 , wherein the plating is a metal plating, which is at least one of Ni—P or Ni—W plating system.

5 . The composite liner of claim 1 , wherein the anti-corrosion coating comprises a polymer coating.

6 . The composite liner of claim 5 , wherein the polymer coating comprises an epoxy coating.

7 . A method of manufacturing a composite liner for a steel tube, comprising:
coating an inner diameter (ID) of the steel tube with an anti-corrosion coating or plating; inserting a glass-reinforced epoxy composite liner into the steel tube; and curing the glass-reinforced epoxy composite liner inside the steel tube.

8 . The method of claim 7 , wherein the glass-reinforced epoxy composite liner has an outer diameter larger than the inner diameter of the steel tube.

9 . The method of claim 7 , wherein the anti-corrosion coating or metal plating comprises a low gas permeability material.

10 . The method of claim 9 , wherein the anti-corrosion coating comprises a polymer coating.

11 . The method of claim 9 , wherein the anti-corrosion metal plating is at least one of Ni—P, or Ni—W coating.

12 . The method of claim 9 , wherein the curing stage involves precise control of curing temperature and time to cure resin within the liner to a lesser degree, retaining deformable characteristics.

13 . The method of claim 9 , wherein the glass-reinforced epoxy composite liner comprises a dual catalyst system.

14 . The method of claim 13 , wherein the dual catalyst system comprises a low temperature catalyst and a high temperature catalyst.

15 . The method of claim 13 , further comprising filament winding glass-reinforced epoxy on a mandrel.

16 . A composite liner for a steel tube comprising:
a resin system directly affixed to an inner diameter of a steel tube without requiring a troublesome grout layer, thereby eliminating a need for costly and less dependable grout layers; and a thin coating or metal plating measuring between 2 to 10 mills in thickness, wherein the thin coating or metal plating is sandwiched between the glass-reinforced epoxy resin system and the inner diameter of the steel tube.

17 . The composite liner of claim 16 , wherein the resin system comprises glass-reinforced epoxy.

18 . The composite liner of claim 17 , wherein the glass-reinforced epoxy resin system is about 2 to 4 mm thick.

19 . The composite liner of claim 16 , wherein the metal plating is at least one of Ni—P or Ni—W plating system.

20 . The composite liner of claim 16 , wherein the thin coating comprises an epoxy coating.

Assignees

• Cnpc Usa Corp
• Beijing Huamei Inc
• China Nat Petroleum Corp

Inventors

• Zhao Lei
• Dunne Timothy
• Ren Jiaxiang (Jason)
• Cheng Peng
• Li Jiaying
• Li Wenhong

Classifications

• B32B15/14 Primary

  next to a fibrous or filamentary layer · CPC title

• B32B5/02

  characterised by structural features of a {fibrous or filamentary} layer {(layer formed of metallic wires B32B15/02; layer formed of natural mineral fibres B32B19/02; layer formed of wood fibres B32B21/02)} · CPC title

• B32B15/18

  comprising iron or steel {(B32B15/011, B32B15/012 and B32B15/013 take precedence)} · CPC title

• F16L9/14

  Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups (F16L9/16 - F16L9/22 take precedence) · CPC title

• B32B2037/243

  Coating · CPC title