- 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
|
83
|
67
|
63
|
71
|
67
|
53
|
42
|
42
|
27
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Saudi Arabian Oil Company | 13839 |
131 |
| Halliburton Energy Services, Inc. | 21107 |
51 |
| BP Exploration Operating Company Limited | 261 |
37 |
| Chevron U.S.A. Inc. | 4040 |
31 |
| Schlumberger Technology Corporation | 11266 |
28 |
| Aramco Services Company | 4154 |
24 |
| Schlumberger Canada Limited | 7487 |
21 |
| Services Petroliers Schlumberger | 5921 |
18 |
| Schlumberger Technology B.v. | 5242 |
16 |
| ConocoPhillips Company | 1699 |
15 |
| Landmark Graphics Corporation | 1510 |
14 |
| Shell USA, Inc. | 1275 |
14 |
| PetroChina Company Limited | 748 |
13 |
| Baker Hughes, a GE Company, LLC | 2101 |
13 |
| Schlumberger Holdings Limited | 2755 |
11 |
| BP Corporation North America Inc. | 743 |
10 |
| IFP Energies Nouvelles | 3007 |
10 |
| Prad Research and Development Limited | 2685 |
10 |
| Baker Hughes Incorporated | 5131 |
9 |
| Cenovus Energy Inc. | 428 |
9 |
| Other owners | 437 |