- 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: 8466
10-year publication summary
|
733
|
818
|
910
|
750
|
878
|
746
|
576
|
590
|
489
|
35
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20438 |
1385 |
| Schlumberger Technology Corporation | 10263 |
690 |
| Saudi Arabian Oil Company | 12446 |
541 |
| Schlumberger Canada Limited | 7154 |
440 |
| Services Petroliers Schlumberger | 5633 |
382 |
| Schlumberger Technology B.v. | 5075 |
270 |
| Landmark Graphics Corporation | 1521 |
240 |
| Baker Hughes, a GE Company, LLC | 2138 |
183 |
| Aramco Services Company | 3750 |
182 |
| Geoquest Systems B.V. | 681 |
108 |
| Baker Hughes Oilfield Operations, LLC | 2128 |
97 |
| Baker Hughes Incorporated | 5504 |
91 |
| Baker Hughes Holdings LLC | 3009 |
79 |
| Weatherford Technology Holdings, LLC | 2109 |
78 |
| ExxonMobil Upstream Research Company | 2454 |
77 |
| Cameron International Corporation | 1323 |
65 |
| Chevron U.S.A. Inc. | 3856 |
62 |
| ConocoPhillips Company | 1679 |
61 |
| OneSubsea IP UK Limited | 399 |
45 |
| US Well Services LLC | 224 |
43 |
| Other owners | 3347 |