초록 ▼

A method and apparatus for determining the extent of defects in tubular elements for use in an oil or gas well is disclosed. The apparatus includes an electromagnetic or other suitable inspection device, cooperating with longitudinal and circumferential position detectors for determining the positio

A method and apparatus for determining the extent of defects in tubular elements for use in an oil or gas well is disclosed. The apparatus includes an electromagnetic or other suitable inspection device, cooperating with longitudinal and circumferential position detectors for determining the position and configuration of all defects within a tubular member. Signal generating means are provided for producing signals corresponding to the configuration, longitudinal position, and circumferential position of the defects located within the wall of the tubular member. The signals are processed, preferably by a computer, so that the presence, nature, and precise location of each defect is determined and visually displayed at a suitable display means. Display means are provided for generating a two-dimensional visual display wherein the circumferential and longitudinal positions of the defects are selectably displayed.

대표청구항 ▼

A method of mapping a plurality of defects, said plurality of defects being classified into a plurality of differing types of defects, including defects of differing shapes, lengths, and angular orientations, in a tubular member having a plurality of discrete solid segments, the sum of which compris

A method of mapping a plurality of defects, said plurality of defects being classified into a plurality of differing types of defects, including defects of differing shapes, lengths, and angular orientations, in a tubular member having a plurality of discrete solid segments, the sum of which comprise the entire solid volume of said tubular member, comprising the steps of: generating at least one defect signal representing a defect in at least one discrete solid segment of said tubular member for each of said plurality of defects, each of said at least one defect signal having an amplitude value; generating a longitudinal signal indicating the longitudinal position of said at least one discrete solid segment of said tubular member; generating a circumferential signal indicating the circumferential position of said at least one discrete solid segment of said tubular member; correlating said defect, longitudinal, and circumferential signals to obtain defect data, said defect data including the longitudinal position and circumferential position of said defect in said at least one discrete solid segment of said tubular member; selectively displaying the presence of a selected one of said plurality of said differing types of defects as a plurality of indications in a two-dimensional map, said map including: a first axis corresponding to the length of said tubular member; a second axis corresponding to the circumference of said tubular member.