- 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 41/00 - Equipment or details not covered by groups
Patent holdings for IPC class E21B 41/00
Total number of patents in this class: 9004
10-year publication summary
|
647
|
699
|
763
|
662
|
748
|
652
|
498
|
522
|
501
|
513
|
| 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 |
1518 |
| Schlumberger Technology Corporation | 11089 |
757 |
| Saudi Arabian Oil Company | 13716 |
596 |
| Schlumberger Canada Limited | 7446 |
479 |
| Services Petroliers Schlumberger | 5888 |
415 |
| Schlumberger Technology B.v. | 5224 |
289 |
| Landmark Graphics Corporation | 1516 |
239 |
| Aramco Services Company | 4108 |
198 |
| Baker Hughes, a GE Company, LLC | 2103 |
183 |
| Geoquest Systems B.V. | 799 |
122 |
| Baker Hughes Oilfield Operations, LLC | 2395 |
117 |
| Baker Hughes Incorporated | 5168 |
87 |
| Baker Hughes Holdings LLC | 3000 |
78 |
| ExxonMobil Upstream Research Company | 2377 |
77 |
| Weatherford Technology Holdings, LLC | 2036 |
73 |
| Chevron U.S.A. Inc. | 4018 |
68 |
| Cameron International Corporation | 1355 |
68 |
| ConocoPhillips Company | 1690 |
64 |
| OneSubsea IP UK Limited | 425 |
48 |
| FMC Technologies, Inc. | 608 |
44 |
| Other owners | 3484 |