Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12163384 | Adaptive control of rotating or non-rotating transducer and sensors casing stand-off supported by casing centralizers | Otto N. Fanini, Batakrishna Mandal, Gennady Koscheev, Marvin BATRES, Lesley Allison Fessler | 2024-12-10 |
| 11840924 | Short and wideband isolator for acoustic tools | Jing Jin, Chung Chang | 2023-12-12 |
| 11746642 | Electromagnetic imager design | Baris Guner, Luis Emilio San Martin | 2023-09-05 |
| 11643920 | Dip correction for non-circular borehole and off-center logging | Nam Nguyen, David Orlando Torres | 2023-05-09 |
| 11543555 | Method to estimate formation resistivity | Muralidhar Seshadri, David R. Beard, Baris Guner | 2023-01-03 |
| 11442188 | Dip detection in logging image processing | Nam Nguyen, David Orlando Torres | 2022-09-13 |
| 11385374 | Borehole dispersive wave processing with automatic dispersion matching for compressional and shear slowness | Ruijia Wang, Chung Chang, Joonshik Kim | 2022-07-12 |
| 11339646 | Iterative borehole shape estimation of cast tool | Nam Nguyen, David Orlando Torres | 2022-05-24 |
| 11248457 | Dip correction for non-circular borehole and off-center logging | Nam Nguyen, David Orlando Torres | 2022-02-15 |
| 10775525 | Identifying and visually presenting formation slowness based on low-frequency dispersion asymptotes | Ruijia Wang, Chung Chang, John Philip Granville | 2020-09-15 |
| 10082020 | Acoustic dipole piston transmitter | Laurence T. Wisniewski, Gary L. Fickert, Michael Simmons, Chung Chang | 2018-09-25 |
| 10024992 | Structural element for sonic tools and acoustic isolators | Chung Chang, Muralidhar Seshadri, Jean G. Saint Germain, Paul G. Junghans | 2018-07-17 |
| 9952344 | High-performance dipole acoustic transmitter | Chung Chang, Tianrun Chen, Haoshi Song | 2018-04-24 |
| 9891336 | Acoustic isolator for downhole tools | Chung Chang, Abbas Arian, Paul G. Junghans, Arthur Cheng, Randall B. Jones | 2018-02-13 |
| 9631476 | Variable stiffness downhole tool housing | Chung Chang, Arthur Cheng | 2017-04-25 |
| 9335433 | Dielectric tool-based formation porosity logging system and methods | Jing Li, Marvin Rourke, Michael S. Bittar | 2016-05-10 |
| 9322947 | Acoustic receiver assembly for downhole tools | Chung Chang, Abbas Arian, Randall B. Jones, Arthur Cheng | 2016-04-26 |
| 9158014 | Acoustic source apparatus, systems, and methods | Clovis Bonavides, Batakrishna Mandal, Arthur Cheng, Wei Zhang, Philip William Tracadas +2 more | 2015-10-13 |
| 8947092 | Methods and systems for estimating formation resistivity and porosity | Jing Li, Michael S. Bittar, Marvin Rourke | 2015-02-03 |
| 8698502 | Methods and systems for estimating formation resistivity and porosity | Jing Li, Marvin Rourke, Michael S. Bittar | 2014-04-15 |