- 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: 2806
10-year publication summary
|
182
|
150
|
149
|
112
|
101
|
98
|
66
|
68
|
55
|
5
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| ConocoPhillips Company | 1701 |
224 |
| Halliburton Energy Services, Inc. | 21115 |
145 |
| Harris Corporation | 1363 |
145 |
| Cenovus Energy Inc. | 427 |
136 |
| Saudi Arabian Oil Company | 13865 |
135 |
| SunCor Energy Inc. | 739 |
107 |
| ExxonMobil Upstream Research Company | 2356 |
57 |
| Siemens AG | 24291 |
43 |
| Chevron U.S.A. Inc. | 4050 |
43 |
| Imperial Oil Resources Limited | 170 |
41 |
| Schlumberger Technology Corporation | 11298 |
37 |
| Shell Internationale Research Maatschappij B.V. | 3500 |
36 |
| Schlumberger Canada Limited | 7497 |
34 |
| Acceleware Ltd. | 57 |
33 |
| Dow Global Technologies LLC | 10707 |
31 |
| Aramco Services Company | 4156 |
31 |
| Shell Oil Company | 2114 |
30 |
| Services Petroliers Schlumberger | 5931 |
27 |
| Schlumberger Technology B.v. | 5251 |
26 |
| Nexen Energy ULC | 43 |
24 |
| Other owners | 1421 |