Issued Patents All Time
Showing 1–21 of 21 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10036244 | Acoustic transceiver with adjacent mass guided by membranes | Christophe Rayssiguier | 2018-07-31 |
| 9822627 | Systems and methods for downhole cement evaluation | — | 2017-11-21 |
| 9594177 | Using higher order harmonics to determine acoustic impedance of material behind borehole casings | Andrew Hayman, Kenneth K. Liang | 2017-03-14 |
| 9441479 | Mechanical filter for acoustic telemetry repeater | Stephane Vannuffelen, Christophe Rayssiguier | 2016-09-13 |
| 9110192 | Methods and apparatus to identify layer boundaries in subterranean formations | Jahir Pabon, Henri-Pierre Valero | 2015-08-18 |
| 8767506 | Using higher order harmonics to determine acoustic impedance of material behind borehole casings | Andrew Hayman, Kenneth K. Liang | 2014-07-01 |
| 8750075 | Acoustic transceiver with adjacent mass guided by membranes | Christophe Rayssiguier | 2014-06-10 |
| 8689904 | Detection of gas influx into a wellbore | Richard Timothy Coates, Eric Lavruit | 2014-04-08 |
| 8605548 | Bi-directional wireless acoustic telemetry methods and systems for communicating data along a pipe | — | 2013-12-10 |
| 7689362 | Determining the impedance of material behind a casing in a borehole | Emmanuel Legendre | 2010-03-30 |
| 7522471 | Multimode acoustic imaging in cased wells | Jean-Luc Le Calvez, Emmanuel Legendre, Smaine Zeroug | 2009-04-21 |
| 7345594 | Noise attenuation apparatus for borehole telemetry | Songming Huang, Franck Monmont | 2008-03-18 |
| 7149146 | Determination of the impedance of a material behind a casing combining two sets of ultrasonic measurements | Robert Van Kuijk, Jean-Luc Le Calvez | 2006-12-12 |
| 6536946 | Device and method for directly measuring calorific energy contained in a fuel gas | Didier Dominguez | 2003-03-25 |
| 6526838 | Ultrasonic fluid meter with improved resistance to parasitic ultrasound waves | Eric Lavrut, Philippe Hocquet | 2003-03-04 |
| 6474439 | Dipole logging tool | David C. Hoyle, Hitoshi Tashiro, Alain Brie, Hiroshi Hori, Hitoshi Sugiyama +2 more | 2002-11-05 |
| 6119070 | Method for acoustically measuring a fluid flow rate | Lionel Beneteau | 2000-09-12 |
| 5969263 | Ultrasonic fluid counter for attenuating parasitic ultrasonic waves | Patrice Ligneul, Philippe Hocquet | 1999-10-19 |
| 5226018 | Geophysical prospecting method using pseudo-random pulse sequences | Chung Chang, Christopher Kimball | 1993-07-06 |
| 4951267 | Method and apparatus for multipole acoustic logging | Shu-Kong Chang, Gyula Varga | 1990-08-21 |
| 4661933 | Method and apparatus for acoustically measuring the transverse dimensions of a borehole | Bronislaw Seeman | 1987-04-28 |