David Glascock

Title: David Glascock: Innovator in Ultrasonic Measurement Technologies

Introduction

David Glascock is a notable inventor based in Spring, TX (US). He has made significant contributions to the field of ultrasonic measurement technologies, holding 2 patents that showcase his innovative approach to measuring wall thickness and ovality in tubular materials.

Latest Patents

One of his latest patents is titled "Method and apparatus for measuring wall thickness, ovality of tubular materials." This invention allows for the simultaneous determination of wall thickness and ovality of a tubular. The theoretical radius of a pipe is computed from a measurement of its circumference. An ultrasonic device, typically used for measuring wall thickness, is adapted to also measure maximum and minimum diameters and ovality. This is achieved by equipping the existing ultrasound inspection device with contact surfaces that maintain a fixed distance apart and a known distance from the ultrasonic transducer's surface. The contact surfaces define a chord of known length on the tubular under test. The mean radius of the tubular can be computed from multiple water path measurements around the circumference relative to a known fixture. The maximum and minimum diameter and ovality are calculated from the measured differences in distance from the surface of the tubular to the ultrasonic transducer and the theoretical circle. Wall thickness and ovality can be correlated relative to position using the same apparatus for both measurements.

Another significant patent is the "Phased array ultrasonic NDT system for tubes and pipes." This invention utilizes one or more phased array ultrasonic probes shaped like conical section arcs or an entire conical section ring. These probes emit beams at a fixed incident angle concerning the outer surface of a tube or pipe under inspection. At any given moment, these beams strike the tube at a single small entry zone from various directions. After being refracted at the inspection angle corresponding to the fixed angle of incidence, defects with longitudinal, transverse, and oblique orientations are detected in the three-dimensional volume of the tube wall. The number of entry zones required for complete coverage of the outer surface of the tube depends on the tube's size, the speed at which it passes through the inspection station, and the rate of rotation of the tube.

Career Highlights

David has worked with several companies throughout his career, including R&D Tech Inc. and Cudd Pressure Control, Inc. His experience in these organizations has allowed him to refine his skills and contribute to advancements in ultrasonic measurement