- 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 43/16 - Enhanced recovery methods for obtaining hydrocarbons
Patent holdings for IPC class E21B 43/16
Total number of patents in this class: 3524
10-year publication summary
|
361
|
355
|
274
|
274
|
320
|
259
|
284
|
233
|
225
|
56
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20165 |
331 |
| Saudi Arabian Oil Company | 11322 |
290 |
| Schlumberger Technology Corporation | 9690 |
137 |
| Schlumberger Canada Limited | 6913 |
96 |
| Services Petroliers Schlumberger | 5426 |
79 |
| Chevron U.S.A. Inc. | 3774 |
77 |
| ConocoPhillips Company | 1657 |
77 |
| ExxonMobil Upstream Research Company | 2525 |
75 |
| Schlumberger Technology B.v. | 4951 |
64 |
| Baker Hughes Incorporated | 5689 |
60 |
| Aramco Services Company | 3504 |
59 |
| Shell Internationale Research Maatschappij B.V. | 3792 |
58 |
| Baker Hughes Holdings LLC | 3060 |
54 |
| Shell Oil Company | 2196 |
46 |
| Prad Research and Development Limited | 2696 |
40 |
| Schlumberger Holdings Limited | 2947 |
39 |
| S.p.c.m. SA | 308 |
36 |
| Landmark Graphics Corporation | 1526 |
35 |
| Baker Hughes Oilfield Operations, LLC | 1885 |
34 |
| Cenovus Energy Inc. | 321 |
31 |
| Other owners | 1806 |