Method for inspection of metal tubular goods

  • US 7,552,640 B2
  • Filed: 06/11/2008
  • Issued: 06/30/2009
  • Est. Priority Date: 03/07/2003
  • Status: Active Grant
First Claim
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1. Method for collection and storage of information representing wall thickness of tubular goods, comprising:

  • (a) selecting a section of the wall of a tubular good about which information representing wall thickness is to be recorded in a format readable by digital computer means;

    (b) determining number and spacing of discrete portions within said section of the wall of said tubular good which will produce information representing wall thickness of said section of the wall of said tubular good having desired resolution;

    (c) positioning an ultrasonic detection means which is capable of measuring the thickness of a discrete portion of the wall of a tubular good at a position, which is proximate to a first discrete portion of the selected section of the wall of said tubular good;

    (d) while said ultrasonic detection means is at said position, determining the longitudinal position of said ultrasonic detection means along the axis of said tubular good;

    (e) while said ultrasonic detection means is at said position, determining the circumferential position of said ultrasonic detection means about the circumference of said tubular good;

    (f) while said ultrasonic detection means is at said position, causing said ultrasonic detection means to determine the thickness of said the discrete portion of the section of the wall of the tubular good to which said ultrasonic detection means is proximate;

    (g) making a digital recording of said thickness, said longitudinal position and said circumferential position in an associated relationship;

    (h) repeating steps (c) through (g) above at a plurality of other positions along the wall of said selected section of the wall which has not been previously determined and recorded, until the entire thickness of said wall of said selected section has been determined and recorded and is represented by a plurality of recordings, each of which represents wall thickness, longitudinal position and circumferential position of a discrete portion of the selected section of the wall of said tubular good in an associate relationship; and

    ,(i) making a digital recording of said plurality of recordings in an associated relationship.

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