- 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: 522
10-year publication summary
|
57
|
45
|
45
|
40
|
36
|
38
|
33
|
24
|
26
|
7
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Saudi Arabian Oil Company | 14207 |
30 |
| ExxonMobil Upstream Research Company | 2306 |
24 |
| Halliburton Energy Services, Inc. | 21320 |
20 |
| SunCor Energy Inc. | 734 |
17 |
| Chevron U.S.A. Inc. | 4134 |
14 |
| Cenovus Energy Inc. | 423 |
13 |
| Equinor Energy AS | 495 |
13 |
| Schlumberger Technology Corporation | 11798 |
11 |
| Veolia Water Technologies, Inc. | 81 |
11 |
| Pilot Intellectual Property, LLC | 39 |
10 |
| ConocoPhillips Company | 1708 |
9 |
| Hydrozonix LLC | 28 |
8 |
| General Electric Company | 13888 |
7 |
| Aramco Services Company | 4188 |
6 |
| Imperial Oil Resources Limited | 165 |
6 |
| Linde Aktiengesellschaft | 1424 |
6 |
| Baker Hughes Oilfield Operations, LLC | 2521 |
6 |
| Baker Hughes Incorporated | 4940 |
5 |
| BL Technologies, Inc. | 843 |
5 |
| M-I L.L.C. | 747 |
5 |
| Other owners | 296 |