- 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: 8518
10-year publication summary
|
510
|
531
|
506
|
525
|
591
|
487
|
427
|
470
|
459
|
70
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21125 |
1283 |
| Saudi Arabian Oil Company | 13886 |
575 |
| Schlumberger Technology Corporation | 11326 |
534 |
| Schlumberger Canada Limited | 7511 |
413 |
| Services Petroliers Schlumberger | 5940 |
348 |
| Schlumberger Technology B.v. | 5257 |
316 |
| Baker Hughes Oilfield Operations, LLC | 2421 |
308 |
| Baker Hughes Incorporated | 5094 |
263 |
| Aramco Services Company | 4157 |
164 |
| Weatherford Technology Holdings, LLC | 2035 |
140 |
| Baker Hughes, a GE Company, LLC | 2105 |
131 |
| Baker Hughes Holdings LLC | 2985 |
119 |
| ExxonMobil Upstream Research Company | 2352 |
97 |
| Prad Research and Development Limited | 2683 |
96 |
| Schlumberger Holdings Limited | 2754 |
94 |
| Landmark Graphics Corporation | 1509 |
65 |
| NCS Multistage Inc. | 175 |
64 |
| Flowco Production Solutions, LLC | 63 |
51 |
| Chevron U.S.A. Inc. | 4071 |
49 |
| Petroleum Technology Company AS | 95 |
44 |
| Other owners | 3364 |