- 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: 9321
10-year publication summary
|
818
|
910
|
750
|
877
|
748
|
576
|
617
|
540
|
561
|
282
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21284 |
1563 |
| Schlumberger Technology Corporation | 11924 |
803 |
| Saudi Arabian Oil Company | 14349 |
611 |
| Schlumberger Canada Limited | 7621 |
494 |
| Services Petroliers Schlumberger | 6033 |
431 |
| Schlumberger Technology B.v. | 5299 |
296 |
| Landmark Graphics Corporation | 1497 |
240 |
| Aramco Services Company | 4192 |
201 |
| Baker Hughes, a GE Company, LLC | 2048 |
182 |
| Geoquest Systems B.V. | 886 |
132 |
| Baker Hughes Oilfield Operations, LLC | 2556 |
125 |
| Baker Hughes Incorporated | 4897 |
83 |
| Weatherford Technology Holdings, LLC | 2165 |
79 |
| Baker Hughes Holdings LLC | 3011 |
78 |
| ExxonMobil Upstream Research Company | 2288 |
77 |
| Chevron U.S.A. Inc. | 4166 |
73 |
| Cameron International Corporation | 1367 |
70 |
| ConocoPhillips Company | 1716 |
56 |
| OneSubsea IP UK Limited | 440 |
49 |
| FMC Technologies, Inc. | 620 |
46 |
| Other owners | 3632 |