Patent - Method of Inspection of Metal Tubular Goods

The text below is an English translation of the Chinese Patent - Method of Inspection of Metal Tubular Goods.

  1. Method for collection and storage of information representing wall thickness of tubular goods, comprising:

    1. positioning an ultrasonic detection means which is capable of measuring the thickness of a discrete section of the wall of a tubular good at a first position along the wall of a tubular good;
    2. at said first position, determining the longitudinal position of said ultrasonic detection means along the axis of said tubular good;
    3. at said first position, determining the circumferential position of said ultrasonic detection means about the circumference of said tubular good;
    4. at said first position, causing said ultrasonic detection means to determine the thickness of a first discrete section of the wall of said tubular good;
    5. recording the thickness of said first discrete section of said wall, longitudinal position and circumferential position of the tubular good at said first position in an associated relationship;
    6. positioning said ultrasonic detection means in at least a second position along the wall of said tubular good, wherein at said second position said ultrasonic detection means can be caused to determine the thickness of a discrete section of the wall of said tubular good which is adjacent to but partially overlaps the discrete section of the wall of said tubular good determined and recorded at said first position;
    7. recording the thickness of said second discrete section of said wall, longitudinal position and circumferential position of the tubular good at said second position in an associated relationship; and,
    8. associating the recording at said first position and the recording at said second position in an associated relationship.
  2. The method of Claim 1 wherein said recordings are made in digital format which is readable by computer means.
  3. The method of Claim 2 further comprising the step of using a computer means to display the wall of said tubular good in virtual three-dimensional form.
  4. The method of Claim 2 further comprising the step of using a computer means to compute the effect of stresses on the wall of said tubular good.
  5. The method of Claim 1 further comprising the step of synchronizing each circumferential reference to a pre-selected longitude of the wall of the tubular good.
  6. Method for collection and storage of information representing wall thickness of tubular goods, comprising:

    1. positioning an ultrasonic detection means which is capable of measuring the thickness of a discrete section of the wall of a tubular good at a first position along the wall of a tubular good;
    2. at said first position, determining the longitudinal position of said ultrasonic detection means along the axis of said tubular good;
    3. at said first position, determining the circumferential position of said ultrasonic detection means about the circumference of said tubular good;
    4. at said first position, causing said ultrasonic detection means to determine the thickness of a first discrete section of the wall of said tubular good;
    5. recording the thickness of said first discrete section of said wall, longitudinal position and circumferential position of the tubular good at said first position in an associated relationship;
    6. repeating each of the above steps at a plurality of other positions along the wall of the tubular good which has not been previously determined and recorded, until the entire wall of the tubular good 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 section of the wall of the tubular in an associated relationship; and,
    7. associating each of said recordings in an associated relationship.
  7. The method of Claim 6 wherein each of said plurality of other positions partially overlaps each adjacent positions.