- 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 43/12 - Methods or apparatus for controlling the flow of the obtained fluid to or in wells
Patent holdings for IPC class E21B 43/12
Total number of patents in this class: 8577
10-year publication summary
|
621
|
644
|
607
|
646
|
702
|
561
|
485
|
544
|
503
|
143
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21217 |
1301 |
| Saudi Arabian Oil Company | 13953 |
576 |
| Schlumberger Technology Corporation | 11485 |
544 |
| Schlumberger Canada Limited | 7558 |
422 |
| Services Petroliers Schlumberger | 5977 |
356 |
| Schlumberger Technology B.v. | 5267 |
319 |
| Baker Hughes Oilfield Operations, LLC | 2441 |
313 |
| Baker Hughes Incorporated | 5041 |
261 |
| Aramco Services Company | 4162 |
164 |
| Weatherford Technology Holdings, LLC | 2068 |
141 |
| Baker Hughes, a GE Company, LLC | 2094 |
131 |
| Baker Hughes Holdings LLC | 2992 |
119 |
| ExxonMobil Upstream Research Company | 2335 |
97 |
| Prad Research and Development Limited | 2679 |
96 |
| Schlumberger Holdings Limited | 2735 |
93 |
| Landmark Graphics Corporation | 1510 |
66 |
| NCS Multistage Inc. | 173 |
64 |
| Flowco Production Solutions, LLC | 62 |
51 |
| Chevron U.S.A. Inc. | 4092 |
49 |
| Upwing Energy, Inc. | 61 |
47 |
| Other owners | 3367 |