- 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 49/08 - Obtaining fluid samples or testing fluids, in boreholes or wells
Patent holdings for IPC class E21B 49/08
Total number of patents in this class: 3927
10-year publication summary
296
|
316
|
314
|
340
|
233
|
255
|
273
|
227
|
242
|
72
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Halliburton Energy Services, Inc. | 20165 |
827 |
Schlumberger Technology Corporation | 9690 |
550 |
Saudi Arabian Oil Company | 11322 |
297 |
Schlumberger Canada Limited | 6913 |
248 |
Services Petroliers Schlumberger | 5426 |
228 |
Schlumberger Technology B.v. | 4951 |
218 |
Schlumberger Holdings Limited | 2947 |
143 |
Baker Hughes Incorporated | 5689 |
134 |
Prad Research and Development Limited | 2696 |
134 |
Baker Hughes, a GE Company, LLC | 2171 |
68 |
Baker Hughes Oilfield Operations, LLC | 1885 |
55 |
Aramco Services Company | 3504 |
53 |
Landmark Graphics Corporation | 1526 |
33 |
ExxonMobil Upstream Research Company | 2525 |
28 |
ConocoPhillips Company | 1657 |
25 |
Chevron U.S.A. Inc. | 3774 |
21 |
Shell Internationale Research Maatschappij B.V. | 3792 |
15 |
Weatherford Technology Holdings, LLC | 2135 |
14 |
IFP Energies Nouvelles | 2717 |
13 |
Baker Hughes Holdings LLC | 3060 |
13 |
Other owners | 810 |