- All sections
- E - Fixed constructions
- E21B - Earth or rock drillingobtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B 4/02 - Fluid rotary type drives
Patent holdings for IPC class E21B 4/02
Total number of patents in this class: 1218
10-year publication summary
|
116
|
99
|
107
|
87
|
76
|
76
|
61
|
70
|
50
|
23
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20835 |
239 |
| Schlumberger Technology Corporation | 10662 |
80 |
| National Oilwell Varco, L.P. | 1661 |
61 |
| Schlumberger Canada Limited | 7273 |
58 |
| Services Petroliers Schlumberger | 5772 |
49 |
| Schlumberger Technology B.v. | 5161 |
44 |
| Baker Hughes Incorporated | 5277 |
44 |
| Thru Tubing Solutions, Inc. | 376 |
38 |
| Smith International, Inc. | 720 |
31 |
| Schlumberger Holdings Limited | 2835 |
30 |
| Saudi Arabian Oil Company | 12947 |
30 |
| Prad Research and Development Limited | 2693 |
29 |
| Baker Hughes, a GE Company, LLC | 2114 |
18 |
| Weatherford Technology Holdings, LLC | 2015 |
13 |
| Impulse Downhole Solutions Ltd. | 55 |
12 |
| Rival Downhole Tools LC | 39 |
12 |
| Baker Hughes Oilfield Operations, LLC | 2288 |
11 |
| Upwing Energy, Inc. | 50 |
11 |
| National Oilwell DHT, L.P. | 131 |
9 |
| US Synthetic Corporation | 624 |
9 |
| Other owners | 390 |