- 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: 8872
10-year publication summary
|
647
|
699
|
763
|
662
|
748
|
652
|
500
|
519
|
496
|
399
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20964 |
1483 |
| Schlumberger Technology Corporation | 10898 |
739 |
| Saudi Arabian Oil Company | 13409 |
587 |
| Schlumberger Canada Limited | 7369 |
473 |
| Services Petroliers Schlumberger | 5830 |
409 |
| Schlumberger Technology B.v. | 5184 |
284 |
| Landmark Graphics Corporation | 1524 |
240 |
| Aramco Services Company | 4033 |
195 |
| Baker Hughes, a GE Company, LLC | 2109 |
183 |
| Geoquest Systems B.V. | 775 |
121 |
| Baker Hughes Oilfield Operations, LLC | 2331 |
113 |
| Baker Hughes Incorporated | 5246 |
89 |
| Baker Hughes Holdings LLC | 2999 |
78 |
| ExxonMobil Upstream Research Company | 2390 |
77 |
| Weatherford Technology Holdings, LLC | 2028 |
75 |
| Cameron International Corporation | 1342 |
68 |
| Chevron U.S.A. Inc. | 3996 |
66 |
| ConocoPhillips Company | 1677 |
63 |
| OneSubsea IP UK Limited | 423 |
48 |
| FMC Technologies, Inc. | 609 |
43 |
| Other owners | 3438 |