- 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 47/06 - Measuring temperature or pressure
Patent holdings for IPC class E21B 47/06
Total number of patents in this class: 4384
10-year publication summary
|
372
|
438
|
372
|
338
|
367
|
286
|
254
|
246
|
238
|
108
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21296 |
778 |
| Schlumberger Technology Corporation | 11893 |
460 |
| Saudi Arabian Oil Company | 14329 |
292 |
| Schlumberger Canada Limited | 7627 |
232 |
| Services Petroliers Schlumberger | 6038 |
201 |
| Schlumberger Technology B.v. | 5302 |
169 |
| Baker Hughes Incorporated | 4903 |
108 |
| Baker Hughes, a GE Company, LLC | 2049 |
77 |
| ConocoPhillips Company | 1716 |
65 |
| Schlumberger Holdings Limited | 2683 |
60 |
| Weatherford Technology Holdings, LLC | 2161 |
60 |
| Baker Hughes Oilfield Operations, LLC | 2551 |
60 |
| Prad Research and Development Limited | 2652 |
59 |
| Landmark Graphics Corporation | 1498 |
51 |
| ExxonMobil Upstream Research Company | 2291 |
51 |
| Chevron U.S.A. Inc. | 4162 |
47 |
| Aramco Services Company | 4192 |
31 |
| Geoquest Systems B.V. | 884 |
31 |
| Baker Hughes Holdings LLC | 3015 |
30 |
| Cameron International Corporation | 1368 |
26 |
| Other owners | 1496 |