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Ultrasonic tubulars inspection device and method

a technology of ultrasonic tubulars and inspection devices, which is applied in the direction of measurement devices, instruments, specific gravity measurements, etc., can solve the problems of all three methods being restricted, and achieve the effect of reducing the number of channels needed, ensuring the effective beam properties, and ensuring the inspection surface area

Inactive Publication Date: 2008-07-31
GIRNDT RICHARD J
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  • Abstract
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Benefits of technology

The present invention relates to a system, method, and apparatus for ultrasonic detection of flaws or defects in oil field tubulars. The invention utilizes curved composite transducers to inspect for flaws in a more efficient and cost-effective way compared to traditional systems. The large composite sheets are shaped over a larger area, reducing the number of channels needed for inspection. The system can detect flaws in the tubulars' longitudinal, transverse, and wall thickness, and can also measure ovality. The method involves passing the tubulars past a circular array of composite transducers and inspecting them for abnormalities. The transducers have a proximate curved surface that is equi-distant from the outer peripheral surface of the tubular. The system can provide a more efficient and cost-effective way to inspect oil field tubulars.

Problems solved by technology

All three of these methods are restricted by certain constants inherent to the use of ultrasound as a testing medium on all types of products, equipment, and structures.

Method used

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  • Ultrasonic tubulars inspection device and method
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  • Ultrasonic tubulars inspection device and method

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Embodiment Construction

[0073]As used herein, the term “a” or “an” may mean one or more. As used herein in the claim(s), when used in conjunction with the word “comprising”, the words “a” or “an” may mean one or more than one. As used herein, “another” may mean at least a second or more.

[0074]As used herein, the term “surface speed” means the actual speed of the tubular surface as it passes the face of an ultrasonic transducer. Expressed in inches per second (ips).

[0075]As used herein, the term “pulse repetition rate” means the number of times per second an ultrasonic transducer is electronically pulsed, resulting in a sound wave of definable parameters expressed in kilohertz (e.g. 2400 pulses per second=2.4 kilohertz).

[0076]As used herein, the term “pulse gap” means the distance between successive “pulses” of a transducer on the surface of the tubular being inspected. Calculated by dividing the surface speed in inches per second by the pulse repetition expressed in thousands (e.g. 2.4 Khz=2400).

[0077]As u...

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Abstract

A system, method, and apparatus for ultrasonic detection of flaws or defects in oil field tubulars utilizing composite transducers. An array of composite transducers are utilized to detect anomalies in the tubulars, such as transverse, wall or longitudinal defects. The use of the composite transducers allow for a greater inspection area over traditional transducers thereby reducing the number of channels needed for inspection of the tubulars.

Description

[0001]This application is a continuation of U.S. non-provisional application Ser. No. 10 / 971,860, filed Oct. 22, 2004, which claimed priority to provisional application Ser. No. 60 / 481,540 filed Dec. 22, 2003, the contents of which are hereby incorporated by reference in their entirety.TECHNICAL FIELD[0002]At least one embodiment of the present invention relates to a system, method and apparatus for the detection of flaws or defects in oil field tubulars. More particularly, the at least one embodiment of the present invention relates to a system, method, and apparatus for ultrasonic detection of flaws or defects in oil field tubulars utilizing curved composite transducers.BACKGROUND OF THE INVENTION[0003]Current tube inspection technology utilizing ultrasonic technology consists of units of three distinct types: 1) rotating head, 2) tube rotates in place, head traverses the length of the tube, and 3) helical advance—canted roller scheme. All three of these methods are restricted by ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G01N29/00
CPCG01N29/04G01N29/27G01N2291/2636G01N2291/044G01N2291/106G01N2291/02854
Inventor GIRNDT, RICHARD J.
Owner GIRNDT RICHARD J
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