| 12398623 |
Systems and methods for condition monitoring of top drive internal blowout preventer valves |
Rogelio Cabrera, Nephtali Gonzalez |
2025-08-26 |
| 12044080 |
Linear motor hoisting system |
— |
2024-07-23 |
| 11959823 |
Measuring backlash of a drive train |
Alejandro Camacho Cardenas |
2024-04-16 |
| 11781383 |
Linear motor hoisting system |
— |
2023-10-10 |
| 11624358 |
Measuring backlash of a pump gear train |
— |
2023-04-11 |
| 11572756 |
Rotational drive system for a blowout preventer |
Dinesh Kumar Dhamodaran |
2023-02-07 |
| 11472681 |
Direct drive drawworks |
Rogelio Cabrera |
2022-10-18 |
| 11326693 |
Lubrication system for a piston pump |
Ban Q. Tran |
2022-05-10 |
| 10697254 |
Drawworks system with variable frequency drive |
Vallie Hodges |
2020-06-30 |
| 10508715 |
Motor assembly for drawworks systems and methods |
Peter William Cave, Jonathan David Deagle, Rogelio Cabrera |
2019-12-17 |
| 10464791 |
Drawworks systems and methods |
Rogelio Cabrera |
2019-11-05 |
| 10400511 |
Hydraulically deactivated clamp |
Farzad Azizi |
2019-09-03 |
| 10208817 |
Drawworks gearbox with redundant braking on input side |
Rogelio Cabrera |
2019-02-19 |
| 9359831 |
Top drive main shaft with threaded load nut |
Richard O. Bradley |
2016-06-07 |
