- 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 43/12 - 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: 7590
10-year publication summary
|
712
|
730
|
620
|
644
|
608
|
647
|
698
|
559
|
448
|
149
|
| 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 |
1056 |
| Saudi Arabian Oil Company | 11322 |
471 |
| Schlumberger Technology Corporation | 9690 |
414 |
| Schlumberger Canada Limited | 6913 |
342 |
| Services Petroliers Schlumberger | 5426 |
282 |
| Baker Hughes Incorporated | 5689 |
281 |
| Schlumberger Technology B.v. | 4951 |
252 |
| Baker Hughes Oilfield Operations, LLC | 1885 |
247 |
| Weatherford Technology Holdings, LLC | 2135 |
154 |
| Aramco Services Company | 3504 |
134 |
| Baker Hughes, a GE Company, LLC | 2171 |
134 |
| Baker Hughes Holdings LLC | 3060 |
126 |
| ExxonMobil Upstream Research Company | 2525 |
102 |
| Schlumberger Holdings Limited | 2947 |
98 |
| Prad Research and Development Limited | 2696 |
96 |
| NCS Multistage Inc. | 172 |
67 |
| Landmark Graphics Corporation | 1526 |
65 |
| Statoil Petroleum AS | 555 |
47 |
| Chevron U.S.A. Inc. | 3774 |
45 |
| Flowco Production Solutions, LLC | 69 |
45 |
| Other owners | 3132 |