- 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
|
74
|
83
|
67
|
63
|
71
|
67
|
53
|
42
|
41
|
18
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Saudi Arabian Oil Company | 13224 |
130 |
| Halliburton Energy Services, Inc. | 20911 |
52 |
| BP Exploration Operating Company Limited | 270 |
39 |
| Chevron U.S.A. Inc. | 3967 |
30 |
| Aramco Services Company | 3987 |
25 |
| Schlumberger Technology Corporation | 10780 |
24 |
| Schlumberger Canada Limited | 7332 |
20 |
| Services Petroliers Schlumberger | 5803 |
17 |
| Schlumberger Technology B.v. | 5176 |
15 |
| ConocoPhillips Company | 1675 |
15 |
| Landmark Graphics Corporation | 1527 |
14 |
| Shell USA, Inc. | 1225 |
14 |
| PetroChina Company Limited | 709 |
13 |
| Baker Hughes, a GE Company, LLC | 2110 |
13 |
| Schlumberger Holdings Limited | 2817 |
11 |
| BP Corporation North America Inc. | 746 |
10 |
| IFP Energies Nouvelles | 2937 |
10 |
| Prad Research and Development Limited | 2693 |
10 |
| Baker Hughes Incorporated | 5274 |
9 |
| Cenovus Energy Inc. | 419 |
9 |
| Other owners | 442 |