- 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: 8454
10-year publication summary
|
576
|
510
|
531
|
506
|
525
|
591
|
487
|
425
|
470
|
450
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21103 |
1263 |
| Saudi Arabian Oil Company | 13716 |
571 |
| Schlumberger Technology Corporation | 11089 |
524 |
| Schlumberger Canada Limited | 7446 |
407 |
| Services Petroliers Schlumberger | 5888 |
343 |
| Schlumberger Technology B.v. | 5224 |
311 |
| Baker Hughes Oilfield Operations, LLC | 2395 |
300 |
| Baker Hughes Incorporated | 5168 |
264 |
| Aramco Services Company | 4108 |
164 |
| Weatherford Technology Holdings, LLC | 2036 |
142 |
| Baker Hughes, a GE Company, LLC | 2103 |
131 |
| Baker Hughes Holdings LLC | 3000 |
119 |
| ExxonMobil Upstream Research Company | 2377 |
99 |
| Schlumberger Holdings Limited | 2780 |
96 |
| Prad Research and Development Limited | 2687 |
96 |
| Landmark Graphics Corporation | 1516 |
65 |
| NCS Multistage Inc. | 181 |
65 |
| Flowco Production Solutions, LLC | 63 |
51 |
| Chevron U.S.A. Inc. | 4018 |
48 |
| Petroleum Technology Company AS | 98 |
46 |
| Other owners | 3349 |