- 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 41/00 - Equipment or details not covered by groups
Patent holdings for IPC class E21B 41/00
Total number of patents in this class: 8110
10-year publication summary
471
|
733
|
818
|
910
|
749
|
877
|
748
|
573
|
565
|
170
|
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 |
1313 |
Schlumberger Technology Corporation | 9690 |
656 |
Saudi Arabian Oil Company | 11322 |
508 |
Schlumberger Canada Limited | 6913 |
422 |
Services Petroliers Schlumberger | 5426 |
370 |
Schlumberger Technology B.v. | 4951 |
260 |
Landmark Graphics Corporation | 1526 |
240 |
Baker Hughes, a GE Company, LLC | 2171 |
184 |
Aramco Services Company | 3504 |
168 |
Geoquest Systems B.V. | 584 |
106 |
Baker Hughes Incorporated | 5689 |
93 |
Baker Hughes Oilfield Operations, LLC | 1885 |
87 |
ExxonMobil Upstream Research Company | 2525 |
81 |
Baker Hughes Holdings LLC | 3060 |
79 |
Weatherford Technology Holdings, LLC | 2135 |
78 |
Cameron International Corporation | 1305 |
64 |
Chevron U.S.A. Inc. | 3774 |
63 |
ConocoPhillips Company | 1657 |
57 |
OneSubsea IP UK Limited | 378 |
42 |
US Well Services LLC | 212 |
42 |
Other owners | 3197 |