Effective area metal loss clustering

Patent metadata

Field	Value
Publication number	US-9708797-B2
Application number	US-201514640911-A
Country	US
Kind code	B2
Filing date	Mar 6, 2015
Priority date	Mar 6, 2015
Publication date	Jul 18, 2017
Grant date	Jul 18, 2017

Abstract

A method of in-line inspection of integrity of a pipeline includes identifying a first prospective cluster related to at least a first feature of the pipeline and a second prospective cluster related to at least a second feature of the pipeline. The method includes calculating an effective area using Length Adaptive Pressure Assessment (LAPA) techniques. The effective area corresponds to a lower calculated burst pressure than surrounding areas of the pipeline. LAPA techniques are used to determine if the first prospective cluster interacts with the second prospective cluster. The method includes combining the first and the second prospective cluster when the effective area includes the first and the second prospective cluster to form a resultant cluster. The method further includes generating an indication of an attribute of the resultant cluster.

First claim

The invention claimed is:

1. A method of in-line inspection of integrity of a pipeline, comprising:
identifying, via a processor, a first prospective cluster related to at least a first feature of the pipeline and a second prospective cluster related to at least a second feature of the pipeline;
calculating, via the processor, an effective area using Length Adaptive Pressure Assessment (LAPA) techniques, wherein the effective area corresponds to a lower calculated burst pressure than surrounding areas of the pipeline, wherein LAPA techniques are used to determine if the first prospective cluster interacts with the second prospective cluster;
combining, via the processor, the first and the second prospective cluster when the effective area includes the first and the second prospective cluster to form a resultant cluster; and
generating, via the processor, an indication of an attribute of the resultant cluster.

2. The method of claim 1 , comprising calculating a second effective area based on the resultant cluster using LAPA techniques.

3. The method of claim 2 , comprising combining the resultant cluster with a third prospective cluster related to a third feature when the second effective area includes the third prospective cluster to form a final cluster.

4. The method of claim 1 , wherein the first and second prospective clusters are determined by utilizing a multiple of minimum extent rule.

5. The method of claim 1 , comprising applying a background level of corrosion to the effective area.

6. The method of claim 1 , wherein the effective area corresponds to the lowest calculated burst pressure of the pipeline.

7. A tangible, non-transitory computer-readable medium comprising instructions configured to be executed by a processor, the instructions comprising instructions to:
identify, via the processor executing the instructions, a first prospective cluster related to a first feature of the pipeline and a second prospective cluster related to a second feature of the pipeline;
calculate, via the processor executing the instructions, an effective area using a technique, wherein the technique comprises a Length Adaptive Pressure Assessment (LAPA) technique, a Remaining Strength (RStreng) technique, or any combination thereof, wherein the technique is used to determine if the first prospective cluster interacts with the second prospective cluster;
combine, via the processor executing the instructions, the first and the second prospective cluster, when the effective area comprises the first and the second prospective cluster, into a resultant cluster; and
generate, via the processor executing the instructions, an indication of the resultant cluster.

8. The non-transitory computer-readable medium of claim 7 , the instructions comprising instructions to taper a background noise level around an edge of the first prospective cluster to model features in recovery areas.

9. The non-transitory computer-readable medium of claim 7 , the instructions comprising instructions to determine if the effective area overlaps the first and the second prospective cluster.

10. The non-transitory computer-readable medium of claim 7 , wherein the first and second prospective cluster are combined only if the effective area overlaps the first and the second prospective cluster.

11. The non-transitory computer-readable medium of claim 7 , the instructions comprising instructions to calculate a burst pressure based on LAPA interaction, RStreng interaction, or any combination thereof, between the first and the second prospective cluster.

12. An electronic device configured to assess features of a pipeline, comprising:
a processor operatively coupled to a memory, wherein the processor is configured to:
identify via the processor a first prospective cluster related to a first feature of the pipeline and a second prospective cluster related to a second feature of the pipeline;
calculate via the processor an effective area using an interaction technique, wherein the interaction technique comprises a Length Adaptive Pressure Assessment (LAPA) technique, a Remaining Strength (RStreng) technique, or any combination thereof, wherein the interaction technique is used to determine if the first prospective cluster interacts with the second prospective cluster;
combine via the processor the first and the second prospective cluster when the effective area includes the first and the second prospective cluster to form a resultant cluster; and
generate via the processor an indication of the resultant cluster.

13. The electronic device of claim 12 , wherein the first prospective cluster comprises a first box displayed on a display coupled to the electronic device.

14. The electronic device of claim 13 , wherein the first box comprises a depth value, length value, and width value of the first feature.

15. The electronic device of claim 14 , wherein the first prospective cluster comprises a second box if the distance between the first box and the second box is less than a preset multiple of a wall thickness.

16. The electronic device of claim 12 , wherein the effective area is associated with a section with a lowest burst pressure of a profile of the pipeline.

17. The electronic device of claim 12 , wherein the LAPA technique is used as the interaction technique to determine if the first prospective cluster interacts with the second prospective cluster.

18. The electronic device of claim 12 , wherein assessment of the pipeline is performed in-line.

19. The electronic device of claim 12 , wherein the processor is configured identify the first prospective cluster by determining if a first box interacts with a second box based on whether a distance between the first box and the second box is less than a multiple of a pipe wall thickness or less than a multiple of a length of the shortest box.

20. The electronic device of claim 19 , wherein the first box comprises an attribute, wherein the attribute comprises a depth, length, width, location, or any combination thereof.

Assignees

• Gen Electric

Inventors

• Farnie Steven

Classifications

• G01M5/0025 Primary

  of elongated objects, e.g. pipes, masts, towers or railways (G01M5/0058 takes precedence) · CPC title

• G01L7/00

  Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements ({G01L11/004 takes precedence;} transmitting or indicating the displacement of mechanical pressure-sensitive elements by electric {, e.g., photoelectric} or magnetic means G01L9/00; measuring differences of two or more pressure values G01L13/00; measuring two or more pressure values simultaneously G01L15/00) · CPC title

• E03B7/07 Primary

  Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems · CPC title

• G01M5/0033

  by determining damage, crack or wear · CPC title