Method for producing a pipe lined with an inner liner

Patent metadata

Field	Value
Publication number	US-11204111-B2
Application number	US-201816756169-A
Country	US
Kind code	B2
Filing date	Oct 24, 2018
Priority date	Oct 25, 2017
Publication date	Dec 21, 2021
Grant date	Dec 21, 2021

Abstract

A pipe, the inner surface of which is lined with a thermoplastic layer, is produced by a process comprising the following steps:a) a metal pipe is provided,b) a tubular inliner composed of a thermoplastic material is provided,c) a tape is cohesively helically bonded to the inliner, wherein the region of the contact surface of the tape consists of a moulding composition or an adhesive which adhere firmly to the surface of the inliner, and wherein the region of the opposing surface of the tape consists of a moulding composition or an adhesive which adhere firmly to the metal of the pipe,wherein the tape contains unidirectional reinforcing fibers;d) the cross section of the inliner is optionally reduced by exposure to an external force,e) the inliner is inserted into the metal pipe,f) by means of contact pressure and optionally heat, the inliner and metal pipe are firmly bonded to each other.Relative movements between the metal pipe and inliner are thereby prevented; the inliner also has high safety against collapse. The pipe is used to produce a routed pipeline.

First claim

The invention claimed is:

1. A process for producing a metal pipe, an inner surface of which is lined with a thermoplastic layer, wherein the process comprises the following steps:
a) a metal pipe is provided;
b) a tubular polymeric inliner composed of a thermoplastic material is provided;
c) a tape is cohesively helically bonded to the tubular polymeric inliner, wherein a region of a contact surface of the tape consists of a moulding composition or an adhesive which adhere firmly to a surface of the tubular polymeric inliner, and wherein a region of an opposing surface of the tape consists of a moulding composition or an adhesive which adhere firmly to the metal of the pipe,
wherein the tape unidirectionally contains reinforcing fibers,
wherein the tape comprises from 3 to 20% by volume of reinforcing fibers based on a volume of the tape;

d) a cross section of the tubular polymeric inliner is optionally reduced by exposure to an external force;
e) the tubular polymeric inliner is inserted into the metal pipe;
f) by means of contact pressure and optionally heat, the tubular polymeric inliner and metal pipe are firmly bonded to each other.

2. The process according to claim 1 , wherein
the tubular polymeric inliner consists of a moulding composition consisting to an extent of at least 50% by weight of poly amide, poly olefin, fluoropolymer, polyarylene ether ketone or polyphenylene sulfide.

3. The process according to claim 2 , wherein the tape consists of one to four layers.

4. The process according to claim 3 , wherein at least one layer of the tape consists of a moulding composition consisting to an extent of at least 50% by weight of polyolefin, polyamide, fluoropolymer, polyarylene ether ketone or polyphenylene sulfide.

5. The process according to claim 4 , wherein the tape on a side facing the tubular polymeric inliner comprises a layer composed of an adherent moulding composition or an adhesive.

6. The process according to claim 4 , wherein the tape on a side facing the metal pipe comprises a layer composed of an adherent moulding composition or an adhesive.

7. The process according to claim 6 , wherein the adhesive is selected from the group consisting of pressure-sensitive adhesive, epoxy resin adhesive, polyurethane adhesive, phenol resin adhesive, polyester resin adhesive, poly amide hot-melt adhesive, cyanoacrylate adhesive, polysulfide adhesive, light curing adhesive and anaerobically curing adhesive.

8. A pipe produced according to claim 2 .

9. The process according to claim 1 , wherein
the tape consists of from one to four layers.

10. The process according to claim 9 , wherein
at least one layer of the tape consists of a moulding composition consisting to an extent of at least 50% by weight of poly olefin, poly amide, fluoropolymer, polyarylene ether ketone or polyphenylene sulfide.

11. The process according to claim 9 , wherein
the tape on a side facing the tubular polymeric inliner comprises a layer composed of an adherent moulding composition or an adhesive.

12. The process according to claim 11 , wherein
the adhesive is selected from a group consisting of pressure-sensitive adhesive, epoxy resin adhesive, polyurethane adhesive, phenol resin adhesive, polyester resin adhesive, polyamide hot-melt adhesive, cyanoacrylate adhesive, polysulfide adhesive, light curing adhesive and anaerobically curing adhesive.

13. The process according to claim 9 , wherein
the tape on a side facing the metal pipe comprises a layer composed of an adherent moulding composition or an adhesive.

14. A pipe produced according to claim 1 .

15. A routed pipeline comprising the pipe according to claim 14 .

16. The routed pipeline produced using a pipe according to claim 15 ,
wherein
in the mining sector the routed pipeline serves for the transport of wastewater, gas, oil, crude oil, refined products, water-oil mixtures, sand-water-oil mixtures or slurries.

17. The routed pipeline produced using a pipe according to claim 15 , wherein
the routed pipeline serves to reinforce and line an oil or gas production well.

18. Pipeline produced using a pipe according to claim 15 , wherein
the routed pipeline serves as drilling column during borehole construction in oil or gas fields.

19. Pipeline produced using a pipe according to claim 15 , wherein
the routed pipeline is a conveying pipe, a collecting pipe or a transportation pipe for crude oil or natural gas.

20. Pipeline produced using a pipe according to claim 15 , wherein
the routed pipeline is a pipe for supercritical CO2.

Assignees

• Evonik Operations Gmbh

Inventors

• Gosi De Aquino Fábio
• Hartmann Markus
• Demicoli Daniel
• Göring Rainer
• Van Laak Hermann
• Beyer Horst
• Li Lan De Gans

Classifications

• B32B7/12

  using interposed adhesives or interposed materials with bonding properties · CPC title

• B29C63/46

  of internal surfaces · CPC title

• F16L9/147 Primary

  comprising only layers of metal and plastics with or without reinforcement · CPC title

• F16L58/1009

  the coating being placed inside the pipe · CPC title

• B32B1/08

  Tubular products · CPC title