Inventor · disambiguated record
Chung Chang
Also filed as: CHANG CHUNG · CHANG CHUNG-JEI
50 granted patents·10 pending applications·99 citations·filing 2002–2024
97Inventor score
Top patents by PatentIndex Score
60 records- 0195US11840924B2Short and wideband isolator for acoustic toolsHALLIBURTON ENERGY SERVICES INC·Filed 2021·Granted Dec 12, 2023·4 cites·18 claims
- 0293US10393903B2Acoustic logging tool utilizing fundamental resonanceHALLIBURTON ENERGY SERVICES INC·Filed 2015·Granted Aug 27, 2019·7 cites·18 claims
- 0391US11770975B2Acoustic sensor self-induced interference controlHALLIBURTON ENERGY SERVICES INC·Filed 2020·Granted Sep 26, 2023·2 cites·18 claims
- 0489US10082020B2Acoustic dipole piston transmitterHALLIBURTON ENERGY SERVICES INC·Filed 2014·Granted Sep 25, 2018·9 cites·18 claims
- 0587US11650346B2Downhole acoustic measurementHALLIBURTON ENERGY SERVICES INC·Filed 2020·Granted May 16, 2023·3 cites·19 claims
- 0685US10481288B2Ultrasonic transducer with improved backing elementHALLIBURTON ENERGY SERVICES INC·Filed 2015·Granted Nov 19, 2019·3 cites·17 claims
- 0785USD477980STool handleFiled 2002·Granted Aug 5, 2003·31 cites·1 claims
- 0884US10670761B2Quasi-static Stoneley slowness estimationHALLIBURTON ENERGY SERVICES INC·Filed 2016·Granted Jun 2, 2020·3 cites·19 claims
- 0983US11415720B2Downhole ultrasound image correction in oil based mudHALLIBURTON ENERGY SERVICES INC·Filed 2019·Granted Aug 16, 2022·3 cites·21 claims
- 1083US10598563B2Downhole acoustic source localizationHALLIBURTON ENERGY SERVICES INC·Filed 2016·Granted Mar 24, 2020·2 cites·20 claims
- 1182US12022736B2Acoustic sensor self-induced interference controlHALLIBURTON ENERGY SERVICES INC·Filed 2023·Granted Jun 25, 2024·0 cites·20 claims
- 1281US11662495B2Sonic through tubing cement evaluationHALLIBURTON ENERGY SERVICES INC·Filed 2020·Granted May 30, 2023·2 cites·20 claims
- 1379US12196908B2Through tubing cement evaluation based on casing extensional wavesHALLIBURTON ENERGY SERVICES INC·Filed 2021·Granted Jan 14, 2025·1 cites·20 claims
- 1479US11209565B2High precision acoustic logging processing for compressional and shear slownessHALLIBURTON ENERGY SERVICES INC·Filed 2017·Granted Dec 28, 2021·2 cites·20 claims
- 1578US10024992B2Structural element for sonic tools and acoustic isolatorsHALLIBURTON ENERGY SERVICES INC·Filed 2015·Granted Jul 17, 2018·2 cites·19 claims
- 1674US11927712B2Downhole ultrasound image correction in oil based mudHALLIBURTON ENERGY SERVICES INC·Filed 2022·Granted Mar 12, 2024·0 cites·20 claims
- 1774US11519255B2Downhole tool dynamic and motion measurement with multiple ultrasound transducerHALLIBURTON ENERGY SERVICES INC·Filed 2019·Granted Dec 6, 2022·2 cites·22 claims
- 1872US11243326B2Borehole imaging using amplitudes of refracted acoustic wavesHALLIBURTON ENERGY SERVICES INC·Filed 2016·Granted Feb 8, 2022·1 cites·20 claims
- 1972US10473808B2Acoustic logging tool utilizing fundamental resonanceHALLIBURTON ENERGY SERVICES INC·Filed 2015·Granted Nov 12, 2019·2 cites·23 claims
- 2072US9110166B2Acoustic imagingCHANG CHUNG·Filed 2011·Granted Aug 18, 2015·5 cites·30 claims
- 2170US10317555B2Method of minimizing tool response for downhole logging operationsHALLIBURTON ENERGY SERVICES INC·Filed 2016·Granted Jun 11, 2019·1 cites·21 claims
- 2269US10288758B2Wide bandwidth borehole dipole source for acoustic loggingCHANG CHUNG·Filed 2012·Granted May 14, 2019·3 cites·24 claims
- 2369US9891336B2Acoustic isolator for downhole toolsHALLIBURTON ENERGY SERVICES INC·Filed 2014·Granted Feb 13, 2018·2 cites·22 claims
- 2469US9322947B2Acoustic receiver assembly for downhole toolsHALLIBURTON ENERGY SERVICES INC·Filed 2014·Granted Apr 26, 2016·2 cites·23 claims
- 2568US11293904B2Acoustic receivers with cylindrical crystalsHALLIBURTON ENERGY SERVICES INC·Filed 2020·Granted Apr 5, 2022·0 cites·20 claims
- 2667US9757770B2Asymmetric bender bar transducerHALLIBURTON ENERGY SERVICES INC·Filed 2013·Granted Sep 12, 2017·2 cites·22 claims
- 2767US2025075614A1Tubing eccentricity evaluation using acoustic signalsHALLIBURTON ENERGY SERVICES INC·Filed 2024·Application pending·0 cites
- 2865US2025362424A1Self-adjustable air chamber for downhole sonic shieldingHALLIBURTON ENERGY SERVICES INC·Filed 2024·Application pending·0 cites
- 2963US10947838B2Echo velocity measurements without using recessed ultrasonic transceiverHALLIBURTON ENERGY SERVICES INC·Filed 2019·Granted Mar 16, 2021·0 cites·20 claims
- 3061US12360266B2Acoustic transducer with piezoelectric elements having different polaritiesHALLIBURTON ENERGY SERVICES INC·Filed 2021·Granted Jul 15, 2025·0 cites·20 claims
- 3161US10293376B2Bender bar transducer with at least three resonance modesHALLIBURTON ENERGY SERVICES INC·Filed 2014·Granted May 21, 2019·1 cites·25 claims
- 3260US9952344B2High-performance dipole acoustic transmitterHALLIBURTON ENERGY SERVICES INC·Filed 2014·Granted Apr 24, 2018·1 cites·32 claims
- 3359US12078052B2Tubing eccentricity evaluation using acoustic signalsHALLIBURTON ENERGY SERVICES INC·Filed 2021·Granted Sep 3, 2024·0 cites·23 claims
- 3459US2025179916A1Computing A0 Mode Attenuation For Cement Evaluation In Cased WellsHALLIBURTON ENERGY SERVICES INC·Filed 2023·Application pending·0 cites
- 3558US9869141B2Downhole tool vibration device and methodCHANG CHUNG·Filed 2012·Granted Jan 16, 2018·1 cites·23 claims
- 3658US9631476B2Variable stiffness downhole tool housingCHANG CHUNG·Filed 2012·Granted Apr 25, 2017·1 cites·18 claims
- 3757US10663435B2Acoustic receivers with cylindrical crystalsHALLIBURTON ENERGY SERVICES INC·Filed 2017·Granted May 26, 2020·0 cites·18 claims
- 3855US2024085582A1Cement bond evaluation in a wellboreHALLIBURTON ENERGY SERVICES INC·Filed 2022·Application pending·0 cites
- 3954US11280926B2Hydrophone having no internal leadsHALLIBURTON ENERGY SERVICES INC·Filed 2019·Granted Mar 22, 2022·0 cites·20 claims
- 4054US10330810B2Hydrophone having no internal leadsHALLIBURTON ENERGY SERVICES INC·Filed 2014·Granted Jun 25, 2019·1 cites·17 claims
- 4154US2024288600A1Slim sonic logging tool with multiple modules for borehole resonance mode and pitch-catch measurementHALLIBURTON ENERGY SERVICES INC·Filed 2022·Application pending·0 cites
- 4253US10663612B2Real-time determination of mud slowness, formation type, and monopole slowness picks in downhole applicationsHALLIBURTON ENERGY SERVICES INC·Filed 2016·Granted May 26, 2020·0 cites·18 claims
- 4352US11994642B2Method and apparatus for geophysical formation evaluation measurements behind casingHALLIBURTON ENERGY SERVICES INC·Filed 2019·Granted May 28, 2024·0 cites·20 claims
- 4452US11662496B2Through tubing acoustic measurementsHALLIBURTON ENERGY SERVICES INC·Filed 2021·Granted May 30, 2023·0 cites·20 claims
- 4552US11550073B2Enhanced-resolution rock formation body wave slowness determination from borehole guided wavesHALLIBURTON ENERGY SERVICES INC·Filed 2016·Granted Jan 10, 2023·0 cites·10 claims
- 4650US10775525B2Identifying and visually presenting formation slowness based on low-frequency dispersion asymptotesHALLIBURTON ENERGY SERVICES INC·Filed 2017·Granted Sep 15, 2020·0 cites·20 claims
- 4749US11512586B2Logging while drilling toolHALLIBURTON ENERGY SERVICES INC·Filed 2020·Granted Nov 29, 2022·0 cites·16 claims
- 4849US11143777B2Quadruple transmitter and methods to determine wave velocities of a downhole formationHALLIBURTON ENERGY SERVICES INC·Filed 2018·Granted Oct 12, 2021·0 cites·20 claims
- 4948US9926781B2Wide bandwidth drill pipe structure for acoustic telemetryHALLIBURTON ENERGY SERVICES INC·Filed 2014·Granted Mar 27, 2018·0 cites·21 claims
- 5047US11112519B2Automatic slowness-frequency range determination for advanced borehole sonic data processingHALLIBURTON ENERGY SERVICES INC·Filed 2017·Granted Sep 7, 2021·0 cites·20 claims
Showing the top 50 of 60 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when Chung Chang files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →