1
Alfred V Clark, George Alers, Thanh Nguyen, Christopher Hehman, Kevin Coakley: Ultrasonic strain gage using a motorized electromagnetic acoustic transducer. The United States of America represented by the Secretary of Commerce, Rick Martin, Patent Law Offices of Rick Martin P C, January 7, 2003: US06502463 (12 worldwide citation)

A method and apparatus for measurement of stress in a specimen utilizing a motorized electromagnetic acoustic transducer (EMAT). Stress causes a rotation of the pure-mode polarization directions of SH-waves and a change in the phase of waves polarized along these certain directions. The method utili ...


2
Alfred V Clark, George Alers, Thanh Nguyen, Christopher Hehman, Kevin Coakley: Ultrasonic strain gage using a motorized electromagnetic acoustic transducer. The United States of America represented by the Secretary of Commerce, Patent Law Offices of Rick Martin, November 6, 2001: US06311558 (6 worldwide citation)

A method for measurement of stress in a specimen utilizing a motorized electromagnetic acoustic transducer (EMAT). Stress causes a rotation of the pure-mode polarization directions of SH-waves and a change in the phase of waves polarized along these certain directions. The method utilizes a rotating ...


3
Xiao Ming Tang, Alexei Bolshakov, Joseph Barolak, Douglas Patterson, Vladimir Dubinsky, Ron Alers, George Alers: Use of Lamb waves in cement bond logging. Baker Hughes Incorporated, Bracewell & Giuliani, February 16, 2010: US07663969 (1 worldwide citation)

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 integri ...


4
Xiao Ming Tang, Alexei Bolshakov, Joseph Barolak, Douglas Patterson, Vladimir Dubinsky, Ron Alers, George Alers: Use of lamb waves in cement bond logging. Baker Hughes Incorporated, Gilbreth Roebuck Bynum Derrington Schmidt Walker &, Tran, September 7, 2006: US20060198243-A1

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 integri ...