- 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: 2811
10-year publication summary
|
313
|
258
|
202
|
210
|
153
|
143
|
132
|
92
|
76
|
41
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| ConocoPhillips Company | 1673 |
221 |
| Harris Corporation | 1431 |
154 |
| Halliburton Energy Services, Inc. | 20901 |
146 |
| Cenovus Energy Inc. | 420 |
130 |
| Saudi Arabian Oil Company | 13185 |
129 |
| SunCor Energy Inc. | 736 |
104 |
| ExxonMobil Upstream Research Company | 2397 |
57 |
| Chevron U.S.A. Inc. | 3962 |
46 |
| Siemens AG | 24477 |
43 |
| Shell Internationale Research Maatschappij B.V. | 3537 |
42 |
| Imperial Oil Resources Limited | 170 |
41 |
| Schlumberger Technology Corporation | 10727 |
36 |
| Schlumberger Canada Limited | 7296 |
33 |
| Acceleware Ltd. | 56 |
33 |
| Dow Global Technologies LLC | 10332 |
31 |
| Shell Oil Company | 2139 |
30 |
| Aramco Services Company | 3976 |
30 |
| Services Petroliers Schlumberger | 5787 |
27 |
| Schlumberger Technology B.v. | 5165 |
26 |
| Nexen Energy ULC | 43 |
24 |
| Other owners | 1428 |