Inventor
CHUNG CHANG
Inventor
US
Overview
Patents· 25 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G01Vprimary
G01VGeophysics36%
E21BEarth or rock drilling33%
G01NInvestigating or analysing materials by determining their chemical or physical properties6%
B06BMethods or apparatus for generating or transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency, e.g. for performing mechanical work in general5%
G01BMeasuring length, thickness or similar linear dimensions5%
G01HMeasurement of mechanical vibrations or ultrasonic, sonic or infrasonic waves3%
G06FElectric digital data processing3%
H10NElectric solid-state devices not otherwise provided for3%
G01RMeasuring electric variables2%
G06NComputing arrangements based on specific computational models2%
PatentTitleYear
12,529,817Sonic through tubing cement evaluation202612,360,266Acoustic transducer with piezoelectric elements having different polarities202512,196,908Through tubing cement evaluation based on casing extensional waves202512,078,052Tubing eccentricity evaluation using acoustic signals202412,022,736Acoustic sensor self-induced interference control202411,994,642Method and apparatus for geophysical formation evaluation measurements behind casing202411,927,712Downhole ultrasound image correction in oil based mud202411,840,924Short and wideband isolator for acoustic tools202311,808,136Through-tubing, cased-hole sealed material evaluation using acoustic measurements202311,770,975Acoustic sensor self-induced interference control202311,662,495Sonic through tubing cement evaluation202311,662,496Through tubing acoustic measurements202311,650,346Downhole acoustic measurement202311,578,592Robust logging-while-drilling sonic transmitters with improved strength and bandwidth202311,550,073Enhanced-resolution rock formation body wave slowness determination from borehole guided waves202311,519,255Downhole tool dynamic and motion measurement with multiple ultrasound transducer202211,512,586Logging while drilling tool202211,435,493Enhanced waveform analysis for target modes of borehole waves202211,415,720Downhole ultrasound image correction in oil based mud202211,385,374Borehole dispersive wave processing with automatic dispersion matching for compressional and shear slowness202211,293,904Acoustic receivers with cylindrical crystals202211,280,926Hydrophone having no internal leads202211,243,326Borehole imaging using amplitudes of refracted acoustic waves202211,209,565High precision acoustic logging processing for compressional and shear slowness202111,143,777Quadruple transmitter and methods to determine wave velocities of a downhole formation2021Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2021–2026Patents assigned to HALLIBURTON ENERGY SERVICES INC (25)· patent assignee history
2021–2026Based in US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HALLIBURTON ENERGY SERVICES INC | 25 | 2021–2026 |
Locations
| Location | Patents | Span |
|---|---|---|
| US | 25 | 2021–2026 |