- 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: 8729
10-year publication summary
|
733
|
818
|
910
|
750
|
878
|
746
|
578
|
609
|
504
|
281
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20749 |
1461 |
| Schlumberger Technology Corporation | 10627 |
723 |
| Saudi Arabian Oil Company | 12858 |
564 |
| Schlumberger Canada Limited | 7235 |
463 |
| Services Petroliers Schlumberger | 5756 |
402 |
| Schlumberger Technology B.v. | 5148 |
281 |
| Landmark Graphics Corporation | 1522 |
239 |
| Aramco Services Company | 3910 |
190 |
| Baker Hughes, a GE Company, LLC | 2115 |
183 |
| Geoquest Systems B.V. | 732 |
117 |
| Baker Hughes Oilfield Operations, LLC | 2269 |
106 |
| Baker Hughes Incorporated | 5289 |
90 |
| Baker Hughes Holdings LLC | 3007 |
78 |
| ExxonMobil Upstream Research Company | 2411 |
77 |
| Weatherford Technology Holdings, LLC | 2014 |
73 |
| Cameron International Corporation | 1329 |
67 |
| Chevron U.S.A. Inc. | 3929 |
65 |
| ConocoPhillips Company | 1676 |
63 |
| OneSubsea IP UK Limited | 416 |
47 |
| FMC Technologies, Inc. | 600 |
43 |
| Other owners | 3397 |