Issued Patents All Time
Showing 1–25 of 86 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12241358 | Apparatus and methods for making azimuthal resistivity measurements | — | 2025-03-04 |
| 12228027 | Universal bottomhole assembly node (UBHAN) | Borislav J. Tchakarov | 2025-02-18 |
| 12078057 | Systems and apparatus for downhole communication | Borislav J. Tchakarov | 2024-09-03 |
| 11466565 | Modular resistivity sensor for downhole measurement while drilling | Borislav J. Tchakarov | 2022-10-11 |
| 11326437 | Universal bottomhole assembly node (UBHAN) providing communications to and from rotary steerable systems (RSS) and real time azimuthal resistivity imaging for geosteering and pressure while drilling (FWD) for well control | Borislav J. Tchakarov | 2022-05-10 |
| 11098572 | Boundary tracking control module for rotary steerable systems | Borislav J. Tchakarov | 2021-08-24 |
| 11021911 | Rotary guiding device based on radial driving force | Qingbo Liu, Qingyun Di, Wenxuan Chen, Jiansheng Du, Yongyou Yang +3 more | 2021-06-01 |
| 11008850 | Apparatus and methods for making azimuthal resistivity measurements | — | 2021-05-18 |
| 10837235 | Hybrid rotary guiding device | Qingbo Liu, Qingyun Di, Wenxuan Chen, Jiansheng Du, Yongyou Yang +3 more | 2020-11-17 |
| 10815730 | Anti-rotating device of non-rotating sleeve and a rotary guiding device | Qingbo Liu, Qingyun Di, Wenxuan Chen, Jiansheng Du, Yongyou Yang +3 more | 2020-10-27 |
| 10591635 | Apparatus and methods for communicating with a downhole tool | Lianhe Guo, Bruce Carter | 2020-03-17 |
| 10365391 | Apparatus and methods for making azimuthal resistivity measurements with off-set directional antennas | — | 2019-07-30 |
| 10337322 | Modular resistivity sensor for downhole measurement while drilling | Borislav J. Tchakarov | 2019-07-02 |
| 10253614 | Apparatus and methods for making azimuthal resistivity measurements | — | 2019-04-09 |
| 10114140 | Apparatus and method for microresistivity imaging in which transmitter coil and receiver coil axes are substantially perpendicular to the longitudinal axis of the tool body | — | 2018-10-30 |
| 10072490 | Boundary tracking control module for rotary steerable systems | Borislav J. Tchakarov | 2018-09-11 |
| 9952347 | Apparatus and methods for making azimuthal resistivity measurements | — | 2018-04-24 |
| 9851465 | Apparatus and methods for communicating downhole data | Borislav J. Tchakarov | 2017-12-26 |
| 9767153 | Apparatus and methods for making azimuthal resistivity measurements | — | 2017-09-19 |
| 9645276 | Apparatus and methods for making azimuthal resistivity measurements | — | 2017-05-09 |
| 9638819 | Modular resistivity sensor for downhole measurement while drilling | Borislav J. Tchakarov | 2017-05-02 |
| 9575201 | Apparatus and method for downhole resistivity measurements | — | 2017-02-21 |
| 9359889 | System and methods for selective shorting of an electrical insulator section | Bruce Carter | 2016-06-07 |
| 9273517 | Downhole closed-loop geosteering methodology | Borislav J. Tchakarov, Rodney S. Guenther, Thanh H. Cao, Caimu Tang | 2016-03-01 |
| 9268053 | Apparatus and methods for making azimuthal resistivity measurements | — | 2016-02-23 |