- 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 43/40 - Separation associated with re-injection of separated materials
Patent holdings for IPC class E21B 43/40
Total number of patents in this class: 533
10-year publication summary
|
56
|
57
|
43
|
44
|
40
|
36
|
38
|
32
|
24
|
17
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Saudi Arabian Oil Company | 13206 |
27 |
| ExxonMobil Upstream Research Company | 2394 |
25 |
| Halliburton Energy Services, Inc. | 20908 |
21 |
| SunCor Energy Inc. | 736 |
17 |
| Chevron U.S.A. Inc. | 3966 |
15 |
| Equinor Energy AS | 496 |
14 |
| Veolia Water Technologies, Inc. | 78 |
11 |
| Pilot Intellectual Property, LLC | 39 |
10 |
| Schlumberger Technology Corporation | 10745 |
9 |
| Cenovus Energy Inc. | 420 |
9 |
| ConocoPhillips Company | 1671 |
8 |
| Hydrozonix LLC | 32 |
8 |
| General Electric Company | 13808 |
7 |
| Aramco Services Company | 3981 |
6 |
| Imperial Oil Resources Limited | 170 |
6 |
| Linde Aktiengesellschaft | 1498 |
6 |
| M-I L.L.C. | 808 |
6 |
| Baker Hughes Oilfield Operations, LLC | 2313 |
6 |
| Baker Hughes Incorporated | 5238 |
5 |
| BL Technologies, Inc. | 832 |
5 |
| Other owners | 312 |