- 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 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: 477
10-year publication summary
|
28
|
54
|
67
|
61
|
42
|
33
|
24
|
30
|
31
|
17
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20769 |
73 |
| Saudi Arabian Oil Company | 12891 |
47 |
| Baker Hughes Incorporated | 5281 |
20 |
| Schlumberger Technology Corporation | 10641 |
19 |
| Dorf Ketal Chemicals FZE | 197 |
18 |
| Baker Hughes, a GE Company, LLC | 2114 |
12 |
| Cameron International Corporation | 1329 |
11 |
| Baker Hughes Holdings LLC | 3006 |
11 |
| King Fahd University of Petroleum and Minerals | 1149 |
10 |
| Metrol Technology Limited | 84 |
10 |
| Schlumberger Canada Limited | 7244 |
8 |
| Aramco Services Company | 3921 |
8 |
| ExxonMobil Upstream Research Company | 2411 |
8 |
| Services Petroliers Schlumberger | 5763 |
7 |
| Championx LLC | 491 |
7 |
| Schlumberger Technology B.v. | 5154 |
6 |
| Ecolab USA Inc. | 5456 |
6 |
| Dorf Ketal Chemicals FZE | 52 |
6 |
| Chevron U.S.A. Inc. | 3939 |
5 |
| Upwing Energy LLC | 40 |
5 |
| Other owners | 180 |