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1. WO2020140157 - PIPELINE-LEAK-CONTAINMENT APPARATUS

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[ EN ]

CLAIMS

1. A pipeline-leak-containment apparatus comprising:

- an elongate tubular containment wall comprising a first end opposite a second end and defining an internal bore therebetween, wherein the elongate tubular containment wall comprises an inner layer, a reinforcement layer and an outer layer;

- a first clamp comprising a first inner clamp and a first outer clamp, wherein at least the inner layer at the first end of the elongate tubular containment wall is sealingly sandwiched between the first inner clamp and first outer clamp; and

- a second clamp comprising a second inner clamp and a second outer clamp, wherein at least the inner layer at the second end of the elongate tubular containment wall is sealingly sandwiched between the second inner clamp and the second outer clamp;

wherein, when the pipeline-leak-containment apparatus is positioned around a section of pipe in a pipeline, the first and second inner clamps sealingly engage the pipe to form a sealed interstitial space between the elongate tubular containment wall and the pipe.

2. The pipeline-leak-containment apparatus of claim 1, wherein the inner layer is a rubber material or an equivalent thereof.

3. The pipeline-leak-containment apparatus of claim 1 or 2, wherein the reinforcement layer comprises a metal or metallic alloy.

4. The pipeline-leak-containment apparatus of claim 3, wherein the reinforcement layer comprises braided stainless steel mesh or cable.

5. The pipeline-leak-containment apparatus of any one of claims 1 to 4, wherein the outer layer is comprised of hemp fibers mixed with one or more polymer resins.

6. The pipeline-leak-containment apparatus of any one of claims 1 to 5, wherein the first outer clamp and the second outer clamp are split clamps that sealingly engage the pipe upon tightening of fastening members.

7. The pipeline-leak-containment apparatus of any one of claims 1 to 6, wherein the first inner clamp and the second inner clamp are split clamps that sealingly engage the inner layer of the elongate tubular containment wall upon tightening of fastening members.

8. The pipeline-leak-containment apparatus of claim 6 or 7, wherein the fastening members are flange studs affixed on each end with a nut.

9. The pipeline-leak-containment apparatus of any one of claims 6 to 8, wherein the split clamps are rubber-lined, metal or metallic alloy split clamps.

10. The pipeline-leak-containment apparatus of any one of claims 1 to 9, wherein one or both of the first clamp and second clamp comprise ports for the connection of leak-detection equipment, the ports being in fluid communication with the interstitial space.

11. The pipeline-leak-containment apparatus of claim 10, wherein the leak-detection equipment comprises a source of inert gas and a pressure sensor, wherein pressurized inert gas is applied to the interstitial space to form a pressurized area, the pressurized area indicating a breach or leak in the pipeline when a change in pressure is detected by the pressure sensor.

12. The pipeline-leak-containment apparatus of claim 11, wherein the pressurized area is at a pressure of between about 10% and about 25% of a pipeline operating pressure.

13. The pipeline-leak-containment apparatus of any one of claims 1 to 12, wherein one or both of the first inner clamp and second inner clamp comprise a threaded drag port housing a drag stud that engageably locks the clamp in position on the pipe preventing movement of the pipeline-leak-containment apparatus along the pipeline.

14. A kit-of-parts for providing leak containment to a pipeline, the kit-of-parts comprising:

- an elongate split wrap having opposing ends, that when sealed together at the opposing ends forms an elongate tubular wall comprising a first end opposite a second end and defining an internal bore therebetween;

- a reinforcement material, for external wrapping of the elongate tubular wall to form a reinforced pipe;

- a coating material, for application to an external surface of the reinforced pipe to form a containment pipe; and

- two or more clamps, each clamp comprising an inner clamp and an outer clamp and configured for sealingly sandwiching at least the elongate tubular wall between the inner clamp and the outer clamp; and

wherein the two or more clamps are further configured for sealingly engaging a section of pipe in a pipeline to provide leak containment.

15. The kit-of-parts of claim 14, wherein the elongate split wrap is a rubber material or an equivalent thereof.

16. The kit-of-parts of claim 14 or 15, wherein the reinforcement material is a metal or metallic alloy.

17. The kit-of-parts of claim 16, wherein the reinforcement material is a braided stainless steel mesh or cable.

18. The kit-of-parts of any one of claims 14 to 17, wherein the coating material is a mixture of hemp fibers and one or more polymer resins.

19. The kit-of-parts of any one of claims 14 to 18, wherein the outer clamp is an outer split clamp with fastening members and the inner clamp is an inner split clamp with fastening members.

20. The kit-of-parts of claim 19, wherein one or both of the inner and outer split clamps are rubber-lined, metal or metallic split clamps.

21. The kit-of-parts of any one of claims 14 to 20, further comprising leak-detection equipment, the leak-detection equipment configured for interconnection with a port in at least one of the two or more clamps.

22. The kit-of-parts of claim 21, wherein the leak-detection equipment comprises a source of inert gas and a pressure sensor.

23. The kit-of-parts of claim 22, wherein, when assembled on the section of pipe in the pipeline, forms a pipeline-leak-containment apparatus with a leak detection system, wherein an interstitial space is formed between the containment pipe and the pipeline, and pressurized inert gas delivered to the interstitial space provides for leak detection when changes in pressure are detected by the pressure sensor.

24. The kit-of-parts of any one of claims 14 to 23, further comprising a drag stud configured for insertion into a threaded drag port in at least one of the two or more clamps to engageably lock the clamp in position on the pipe, preventing movement of the clamp along the pipeline.

25. A method for providing leak containment to a section of pipe in a pipeline, the method comprising:

- applying an elongate split wrap comprising two opposing ends around a section of pipe;

- sealing together the opposing ends of the elongate split wrap to form an elongate tubular wall surrounding the section of pipe;

- in any order:

- applying a reinforcement material to an external surface of the elongate tubular wall to form a reinforced pipe, and then externally applying a coating material onto the reinforced pipe to form a containment pipe;

- sealing a first end of at least the elongate tubular wall by sandwiching the first end between a first inner clamp and a first outer clamp of a first clamp, wherein the first clamp sealingly engages the section of pipe in the pipeline; and

- sealing a second end of at least the elongate tubular wall by sandwiching the second end between a second inner clamp and a second outer clamp of a second clamp, wherein the second clamp sealingly engages the section of pipe in the pipeline.

26. The method of claim 25, wherein the elongate split wrap is a rubber material or an equivalent thereof.

27. The method of claim 25 or 26, wherein the reinforcement material is a metal or metallic alloy.

28. The method of claim 27, wherein the reinforcement material is a braided stainless steel mesh or cable.

29. The method of any one of claims 25 to 28, wherein the coating material is a mixture of hemp fibers and one or more polymer resins.

30. The method of any one of claims 25 to 29, wherein the step of sealing together the opposing ends of the elongate split wrap is by a fusion sealing process.

31. The method of any one of claims 25 to 30, wherein the step of externally applying the coating material onto the reinforced pipe is by spraying.

32. The method of any one of claims 25 to 31, wherein the steps are performed in the following order:

- applying the elongate split wrap around the section of pipe in the pipeline;

- sealing together the opposing ends of the elongate split wrap to form the elongate tubular wall surrounding the section of pipe;

- applying the reinforcement material to the external surface of the elongate tubular wall to form the reinforced pipe;

- sealing the first end of the elongate tubular wall by sandwiching the first end between the first inner clamp and the first outer clamp of the first clamp;

- sealing the second end of the elongate tubular wall by sandwiching the second end between the second inner clamp and the second outer clamp of the second clamp; and

- externally applying the coating material onto the reinforced pipe to form the containment pipe.

33. The method of any one of claims 25 to 31, wherein the steps are performed in the following order:

- applying the elongate split wrap around the section of pipe in the pipeline;

- sealing together the opposing ends of the elongate split wrap to form the elongate tubular wall surrounding the section of pipe;

- sealing the first end of the elongate tubular wall by sandwiching the first end between the first inner clamp and the first outer clamp of the first clamp;

- sealing the second end of the elongate tubular wall by sandwiching the second end between the second inner clamp and the second outer clamp of the second clamp;

- applying the reinforcement material to the external surface of the elongate tubular wall to form the reinforced pipe; and

- externally applying the coating material onto the reinforced pipe to form the containment pipe.

34. The method of any one of claims 25 to 31, wherein the steps are performed in the following order:

- applying the elongate split wrap around the section of pipe in the pipeline;

- sealing together the opposing ends of the elongate split wrap to form the elongate tubular wall surrounding the section of pipe;

- applying the reinforcement material to the external surface of the elongate tubular wall to form the reinforced pipe;

- externally applying the coating material onto the reinforced pipe to form the containment pipe;

- sealing the first end of at least the elongate tubular wall by sandwiching the first end between the first inner clamp and the first outer clamp of the first clamp; and

- sealing the second end of at least the elongate tubular wall by sandwiching the second end between the second inner clamp and the second outer clamp of the second clamp.

35. The method of any one of claims 25 to 34, wherein the first and second outer clamps are outer split clamps with fastening members, and sealingly engaging the section of pipe comprises tightening the fastening members to seal the outer split clamps against the section of pipe.

36. The method of any one of claims 25 to 35, wherein the first and second inner clamps are inner split clamps with fastening members, and sandwiching the first and second ends of at least the elongate tubular wall comprises tightening the fastening members to seal the inner split clamps against the elongate tubular wall.

37. The method of any one of claims 25 to 36, further comprising interconnecting leak-detection equipment to a port in one or both of the first clamp and second clamp, wherein the leak-detection equipment is in fluid communication with an interstitial space between the containment pipe and the section of pipe in the pipeline.

38. The method of claim 37, wherein the leak-detection equipment comprises a source of inert gas and a pressure sensor.

39. The method of claim 37 or 38, further comprising monitoring for a leak in the section of pipe in the pipeline, the monitoring comprising:

- providing pressurized inert gas to the interstitial space at a defined pressure; and

- monitoring for a change in the defined pressure that indicates a breach or leak in the section of pipe.

40. The method of claim 39, wherein the defined pressure is a pressure of between about 10% and about 25% of a pipeline operating pressure.

41. The method of any one of claims 25 to 40, further comprising engaging a drag stud housed in one or both of the first inner clamp and second inner clamp against the section of pipe to lock the clamp in place and prevent movement along the pipeline.