- 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 43/20 - Displacing by water
Patent holdings for IPC class E21B 43/20
Total number of patents in this class: 922
10-year publication summary
|
91
|
97
|
75
|
72
|
83
|
75
|
61
|
45
|
43
|
19
|
| 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 |
130 |
| Halliburton Energy Services, Inc. | 20908 |
53 |
| BP Exploration Operating Company Limited | 268 |
38 |
| Chevron U.S.A. Inc. | 3966 |
31 |
| Aramco Services Company | 3981 |
25 |
| Schlumberger Technology Corporation | 10745 |
24 |
| Schlumberger Canada Limited | 7298 |
20 |
| Services Petroliers Schlumberger | 5788 |
17 |
| Schlumberger Technology B.v. | 5163 |
15 |
| Landmark Graphics Corporation | 1525 |
14 |
| ConocoPhillips Company | 1671 |
14 |
| Shell USA, Inc. | 1223 |
14 |
| PetroChina Company Limited | 708 |
13 |
| Baker Hughes, a GE Company, LLC | 2112 |
13 |
| Schlumberger Holdings Limited | 2819 |
11 |
| IFP Energies Nouvelles | 2933 |
10 |
| Prad Research and Development Limited | 2693 |
10 |
| Baker Hughes Incorporated | 5238 |
9 |
| BP Corporation North America Inc. | 744 |
9 |
| Cenovus Energy Inc. | 420 |
9 |
| Other owners | 443 |