1
Joseph Barolak, Alexei Bolshakov, Vladimir Dubinsky, Douglas Patterson: Use of electromagnetic acoustic transducers in downhole cement evaluation. Baker Hughes Incorporated, Timothy Donoughue, Keith R Derrington, December 19, 2006: US07150317 (14 worldwide citation)

A bond log device comprising a sonde, an acoustic transducer, and an acoustic receiver. The acoustic transducer is comprised of a magnet combined with a coil, where the coil is energizable by an electrical current source. The acoustic transducer can also be comprised of an electromagnetic acoustic d ...


2
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 ...


3
Joseph Barolak, Alexei Bolshakov, Vladimir Dubinsky, Douglas Patterson: Use of electromagnetic acoustic transducers in downhole cement evaluation. Baker Hughes Incorporated, Keith R Derrington, Simmons & Derrington, September 22, 2005: US20050205248-A1

A bond log device comprising a sonde, an acoustic transducer, and an acoustic receiver. The acoustic transducer is comprised of a magnet combined with a coil, where the coil is energizable by an electrical current source. The acoustic transducer can also be comprised of an electromagnetic acoustic d ...


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 ...


5
Bolshakov Alexei, Dubinsky Vladimir, Patterson Douglas, Tang Xiao Ming, Joseph Barolak, Alers George A, Alers Ronald B: Use of ram wave in cement bond logging. Baker Hughes, September 14, 2006: JP2006-242955

PROBLEM TO BE SOLVED: To provide method and device useful for measuring status of cement bond allocated in between a annular space between casing and well.SOLUTION: These are method and system useful for measuring status of cement bond allocated in the annular space between casing and well. In this ...