- All sections
- E - Fixed constructions
- E21B - Earth or rock drilling; obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B 43/24 - Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
Patent holdings for IPC class E21B 43/24
Total number of patents in this class: 2876
10-year publication summary
|
447
|
314
|
264
|
203
|
212
|
154
|
147
|
129
|
82
|
27
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| ConocoPhillips Company | 1657 |
221 |
| Harris Corporation | 1591 |
187 |
| Halliburton Energy Services, Inc. | 20165 |
146 |
| Saudi Arabian Oil Company | 11322 |
123 |
| Cenovus Energy Inc. | 321 |
121 |
| SunCor Energy Inc. | 838 |
109 |
| ExxonMobil Upstream Research Company | 2525 |
61 |
| Chevron U.S.A. Inc. | 3774 |
53 |
| Shell Internationale Research Maatschappij B.V. | 3792 |
50 |
| Imperial Oil Resources Limited | 182 |
45 |
| Siemens AG | 24990 |
43 |
| XDI Holdings, LLC | 68 |
34 |
| Dow Global Technologies LLC | 10147 |
33 |
| Schlumberger Technology Corporation | 9690 |
31 |
| Shell Oil Company | 2196 |
30 |
| Acceleware Ltd. | 49 |
30 |
| Schlumberger Canada Limited | 6913 |
29 |
| Aramco Services Company | 3504 |
26 |
| Baker Hughes Incorporated | 5689 |
25 |
| Nexen Energy ULC | 43 |
24 |
| Other owners | 1455 |