- 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: 8806
10-year publication summary
|
733
|
818
|
907
|
747
|
875
|
740
|
575
|
606
|
505
|
356
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20908 |
1473 |
| Schlumberger Technology Corporation | 10745 |
729 |
| Saudi Arabian Oil Company | 13206 |
575 |
| Schlumberger Canada Limited | 7298 |
468 |
| Services Petroliers Schlumberger | 5788 |
405 |
| Schlumberger Technology B.v. | 5163 |
283 |
| Landmark Graphics Corporation | 1525 |
240 |
| Aramco Services Company | 3981 |
192 |
| Baker Hughes, a GE Company, LLC | 2112 |
183 |
| Geoquest Systems B.V. | 752 |
118 |
| Baker Hughes Oilfield Operations, LLC | 2313 |
110 |
| Baker Hughes Incorporated | 5238 |
88 |
| Baker Hughes Holdings LLC | 3005 |
78 |
| ExxonMobil Upstream Research Company | 2394 |
77 |
| Weatherford Technology Holdings, LLC | 2024 |
75 |
| Cameron International Corporation | 1335 |
68 |
| Chevron U.S.A. Inc. | 3966 |
65 |
| ConocoPhillips Company | 1671 |
63 |
| OneSubsea IP UK Limited | 422 |
47 |
| FMC Technologies, Inc. | 607 |
43 |
| Other owners | 3426 |