| 9771792 |
Method and apparatus for multi-channel downhole electromagnetic telemetry |
Jili Liu, David A. Switzer, Aaron W. Logan |
2017-09-26 |
| 9765615 |
Optimizing electromagnetic telemetry transmissions |
Jili Liu, Aaron W. Logan, David A. Switzer, Monica E. Varga, Mojtaba Kazemi Miraki |
2017-09-19 |
| 9752429 |
Downhole electromagnetic and mud pulse telemetry apparatus |
David A. Switzer, Jili Liu, Aaron W. Logan |
2017-09-05 |
| 9719345 |
Electromagnetic communications system and method for a drilling operation |
David A. Switzer, Jili Liu, Mojtaba Kazemi Miraki, Aaron W. Logan |
2017-08-01 |
| 9664038 |
Method and system for transmitting a data frame of an electromagnetic telemetry signal to or from a downhole location |
David A. Switzer, Jili Liu, Aaron W. Logan |
2017-05-30 |
| 9605535 |
Integrated downhole system with plural telemetry subsystems |
Aaron W. Logan, David A. Switzer, Jili Liu, Justin C. Logan |
2017-03-28 |
| 9574441 |
Downhole telemetry signal modulation using pressure pulses of multiple pulse heights |
Jili Liu, David A. Switzer, Aaron W. Logan |
2017-02-21 |