Baker Hughes Corporation

Rosen Swiss Ag

George A Alers

Douglas J Patterson

Vladimir Dubinsky

Xiao Ming Tang

Joseph Gregory Barolak

Alexei Bolshakov

Thomas Beuker

Ronald B Alers

Xiao-Ming Tang

John J Boyle

Ron Alers

A device for destruction-free testing of ferromagnetic component walls with respect to elongate defects has a sending transducer that excites ultrasound waves in a wall area of a ferromagnetic component wall magnetized in a predetermined direction of magnetization. The ultrasound waves propagate on a path oriented by the sending transducer. A receiving transducer receives the ultrasound waves at a spacing from the sending transducer. The configuration of the sending transducer and a high frequency emitted by the sending transducer, which high frequency is to be determined based on a thickness of the ferromagnetic component wall, are selected so as to effect excitation of horizontal shear waves of higher order. The path orientation is selected at a slant angle to the predetermined direction of magnetization. The receiving transducer is positioned lateral to the path and is oriented toward a predetermined testing area of the wall section in the path.

Device for testing ferromagnetic component walls without destruction of the same

A method and apparatus useful to determine the integrity of a cement bond log disposed in the annular space between a casing and a wellbore. The method and apparatus induce a Lamb wave in the casing and into the wellbore. The Lamb wave attenuates upon passage through the cement bond log. The integrity of the cement bond log can be determined through an analysis and evaluation of the attenuation results.

Use of Lamb waves in cement bond logging

Growing community of inventors

San Luis Obispo, CA, United States of America

George A Alers