- 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 49/10 - Obtaining fluid samples or testing fluids, in boreholes or wells using side-wall fluid samplers or testers
Patent holdings for IPC class E21B 49/10
Total number of patents in this class: 865
10-year publication summary
|
50
|
50
|
42
|
31
|
30
|
43
|
38
|
25
|
20
|
9
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Schlumberger Technology Corporation | 9690 |
217 |
| Halliburton Energy Services, Inc. | 20165 |
154 |
| Schlumberger Canada Limited | 6913 |
76 |
| Services Petroliers Schlumberger | 5426 |
65 |
| Schlumberger Technology B.v. | 4951 |
64 |
| Schlumberger Holdings Limited | 2947 |
51 |
| Prad Research and Development Limited | 2696 |
45 |
| Baker Hughes Incorporated | 5689 |
43 |
| Saudi Arabian Oil Company | 11322 |
30 |
| Aramco Services Company | 3504 |
11 |
| Baker Hughes, a GE Company, LLC | 2171 |
10 |
| China Oilfield Services Limited | 79 |
6 |
| Baker Hughes Oilfield Operations, LLC | 1885 |
6 |
| Pietro Fiorentini USA, Inc | 8 |
6 |
| China National Offshore Oil Corporation | 86 |
4 |
| Hydrophilic AS | 7 |
4 |
| Openfield | 30 |
3 |
| Aquaresources SA | 3 |
3 |
| Ben-Gurion University of the Negev Research and Development Authority | 228 |
2 |
| Cameron International Corporation | 1305 |
2 |
| Other owners | 63 |