Method and apparatus for detecting and displaying irregularities in ferrous pipe
AssigneeOilfield Equipment Marketing, Inc.
InventorsBrian Wade Edens, Chester Wayne Pape
Life of this patent
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Abstract
An apparatus for detecting irregularities in a ferrous pipe includes a magnetizing coil for inducing a magnetic field in the ferrous pipe. Inspection shoes measure changes in the induced magnetic field and produce signals representative of those changes. An analog-to-digital converter digitizes the measured signals representing the changes in the induced magnetic field. A processor processes the signals according to frequency to classify the signals by type of irregularity in the ferrous pipe. A screen and/or printer displays the frequency processed signals according to type of irregularity in the ferrous pipe.
Claims33
An apparatus for detecting irregularities in a ferrous pipe, comprising:
- means for inducing a magnetic field in the ferrous pipe;
- means for measuring changes in the induced magnetic field and for producing signals representative of those changes;
- means for processing said signals according to frequency to classify said signals by type of irregularity in the ferrous pipe;
- and
- means for displaying said frequency processed signals according to type of irregularity in the ferrous pipe.
A method for detecting irregularities in a ferrous pipe, comprising the steps of:
- inducing a magnetic field in the ferrous pipe;
- measuring changes in the induced magnetic field;
- producing signals representative of those changes;
- processing said signals according to frequency to classify said signals by type of irregularity in the ferrous pipe;
- and
- displaying said frequency processed signals according to type of irregularity in the ferrous pipe.
Dependencies are inferred from the claim text.