COMPUTER-IMPLEMENTED METHOD TO SCREEN FOR LONGITUDINAL-SEAM ANOMALIES
First Claim
1. A computer-implemented method to detect longitudinal-seam anomalies in a pipeline weld of a pipeline, the computer-implemented method comprising:
- (a) receiving magnetic flux leakage data by a computer, the magnetic flux leakage data being representative of potential crack-like defects in a longitudinal pipeline weld;
(b) displaying the magnetic flux leakage data on a display associated with the computer;
(c) analyzing the magnetic flux leakage data by use of the computer associated with the display responsive to signal characteristics and critical flaw dimensions of the magnetic flux leakage data that may be indicators of the potential crack-like defects, the critical flaw dimensions including at least a maximum length of the potential crack-like defects; and
(d) determining potential crack-like defects by use of the computer and associated display responsive to the analyzing of the magnetic flux leakage data.
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Accused Products
Abstract
Embodiments of the present invention provide computer-implemented methods to detect crack-like features in pipeline welds using magnetic flux leakage data and pattern recognition. A screening process, for example, does not affect or change how survey data is recorded in survey tools; only how it is analyzed after the survey data is completed. Embodiments of the present invention can be used to screen for very narrow axial anomalies in the pipeline welds, and may also be used to predict the length of such anomalies. Embodiments of the present invention also produce a listing of the anomalies based on their relative signal characteristics.
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Citations
26 Claims
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1. A computer-implemented method to detect longitudinal-seam anomalies in a pipeline weld of a pipeline, the computer-implemented method comprising:
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(a) receiving magnetic flux leakage data by a computer, the magnetic flux leakage data being representative of potential crack-like defects in a longitudinal pipeline weld; (b) displaying the magnetic flux leakage data on a display associated with the computer; (c) analyzing the magnetic flux leakage data by use of the computer associated with the display responsive to signal characteristics and critical flaw dimensions of the magnetic flux leakage data that may be indicators of the potential crack-like defects, the critical flaw dimensions including at least a maximum length of the potential crack-like defects; and (d) determining potential crack-like defects by use of the computer and associated display responsive to the analyzing of the magnetic flux leakage data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A computer-implemented method to detect longitudinal-seam anomalies in a pipeline weld of a pipeline, the computer-implemented method comprising:
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(a) receiving magnetic flux leakage data by a computer, the magnetic flux leakage data representative of potential crack-like defects in a longitudinal pipeline weld; (b) displaying the magnetic flux leakage data on a display connected to the computer; (c) analyzing the magnetic flux leakage data by use of the computer and responsive to signal characteristics and critical flaw dimensions of the magnetic flux leakage data that may be indicators of the potential crack-like defects, the critical flaw dimensions including at least a maximum length of the potential crack-like defects, the analyzing of the magnetic flux data performed by the computer including; (1) determining whether the magnetic flux leakage data is consistent with a first predetermined anomaly level by use of the computer to thereby define a level one anomaly candidate, the first predetermined anomaly level having first selected signal characteristics consistent with the presence of longitudinal-seam anomalies, (2) if the magnetic flux leakage data is consistent with the level one anomaly candidate, then determining if the level one anomaly candidate is consistent with a second predetermined anomaly level by use of the computer, the second predetermined anomaly level defining a level two anomaly candidate having second selected signal characteristics different than the first selected signal characteristics and still consistent with the presence of longitudinal-seam anomalies, (3) if the level one anomaly candidate is consistent with the level two anomaly candidate, then determining if the level two anomaly candidate is consistent with a third predetermined anomaly level by use of the computer, the third predetermined anomaly level defining a level three anomaly candidate having third selected signal characteristics different than the first and second selected signal characteristics and yet still consistent with the presence of longitudinal-seam anomalies, the third selected signal characteristics also being indicative of the presence of the selected critical flaw dimensions of a pipeline weld, and (4) if the level two anomaly candidate is consistent with the third level anomaly candidate, then determining if the level three anomaly candidate is consistent with a fourth predetermined anomaly level by use of the computer, the fourth predetermined anomaly level defining a level four anomaly candidate having fourth selected signal characteristics different than the first, second, and third selected signal characteristics and yet still consistent with the presence of longitudinal-seam anomalies; and (d) determining potential crack-like defects by use of the computer and associated display responsive to the analyzing of the magnetic flux leakage data. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A computer-implement method to detect longitudinal-seam anomalies in a low frequency pipeline weld of a pipeline, the computer-implemented method comprising:
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receiving magnetic flux leakage data related to one or more anomaly air gaps within a longitudinal pipeline weld by a computer; displaying on a display associated with the computer the magnetic flux leakage data as one or more selected patterns of data representing selected signal characteristics of the pipeline weld; and analyzing the magnetic flux leakage data responsive to the selected signal characteristic and selected critical flaw dimensions of the pipeline weld, the selected signal characteristics being indicators of potential longitudinal-seam anomalies in the pipeline weld and the selected critical flaw dimensions being at least a maximum length of the potential longitudinal-seam anomalies along a pattern of magnetic flux leakage data. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification