- All sections
- E - Fixed constructions
- E21B - Earth or rock drilling; obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B 41/02 - Equipment or details not covered by groups in situ inhibition of corrosion in boreholes or wells
Patent holdings for IPC class E21B 41/02
Total number of patents in this class: 435
10-year publication summary
|
27
|
28
|
54
|
67
|
61
|
42
|
33
|
24
|
28
|
5
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20165 |
73 |
| Saudi Arabian Oil Company | 11322 |
45 |
| Baker Hughes Incorporated | 5689 |
22 |
| Dorf Ketal Chemicals FZE | 238 |
15 |
| Schlumberger Technology Corporation | 9690 |
13 |
| Baker Hughes, a GE Company, LLC | 2171 |
12 |
| Baker Hughes Holdings LLC | 3060 |
11 |
| Cameron International Corporation | 1305 |
10 |
| Metrol Technology Limited | 85 |
10 |
| Aramco Services Company | 3504 |
8 |
| ExxonMobil Upstream Research Company | 2525 |
8 |
| Ecolab USA Inc. | 5190 |
6 |
| Schlumberger Canada Limited | 6913 |
5 |
| Schlumberger Technology B.v. | 4951 |
5 |
| Fluid Energy Group Ltd. | 70 |
5 |
| Services Petroliers Schlumberger | 5426 |
5 |
| Upwing Energy LLC | 41 |
5 |
| Championx USA Inc. | 250 |
5 |
| Landmark Graphics Corporation | 1526 |
4 |
| Chevron U.S.A. Inc. | 3774 |
4 |
| Other owners | 164 |