- 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 43/24 - 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: 2801
10-year publication summary
|
314
|
265
|
203
|
212
|
154
|
147
|
134
|
92
|
77
|
31
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| ConocoPhillips Company | 1670 |
220 |
| Harris Corporation | 1443 |
154 |
| Halliburton Energy Services, Inc. | 20697 |
146 |
| Cenovus Energy Inc. | 423 |
129 |
| Saudi Arabian Oil Company | 12808 |
129 |
| SunCor Energy Inc. | 731 |
103 |
| ExxonMobil Upstream Research Company | 2412 |
57 |
| Chevron U.S.A. Inc. | 3914 |
46 |
| Siemens AG | 24563 |
43 |
| Shell Internationale Research Maatschappij B.V. | 3544 |
42 |
| Imperial Oil Resources Limited | 168 |
41 |
| Schlumberger Technology Corporation | 10597 |
36 |
| Schlumberger Canada Limited | 7211 |
33 |
| Acceleware Ltd. | 56 |
33 |
| Dow Global Technologies LLC | 10328 |
31 |
| Shell Oil Company | 2142 |
30 |
| Aramco Services Company | 3897 |
30 |
| Services Petroliers Schlumberger | 5743 |
27 |
| Schlumberger Technology B.v. | 5141 |
26 |
| Nexen Energy ULC | 43 |
24 |
| Other owners | 1421 |