- 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 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: 876
10-year publication summary
|
45
|
41
|
30
|
30
|
43
|
36
|
24
|
22
|
26
|
24
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Schlumberger Technology Corporation | 10914 |
209 |
| Halliburton Energy Services, Inc. | 20977 |
175 |
| Schlumberger Canada Limited | 7373 |
75 |
| Services Petroliers Schlumberger | 5835 |
65 |
| Schlumberger Technology B.v. | 5189 |
64 |
| Schlumberger Holdings Limited | 2800 |
48 |
| Prad Research and Development Limited | 2690 |
45 |
| Baker Hughes Incorporated | 5243 |
40 |
| Saudi Arabian Oil Company | 13428 |
33 |
| Aramco Services Company | 4039 |
11 |
| Baker Hughes, a GE Company, LLC | 2109 |
10 |
| Baker Hughes Oilfield Operations, LLC | 2334 |
9 |
| China Oilfield Services Limited | 89 |
6 |
| Pietro Fiorentini USA, Inc | 8 |
6 |
| China National Offshore Oil Corporation | 89 |
4 |
| Hydrophilic AS | 8 |
4 |
| Openfield | 30 |
3 |
| Aquaresources SA | 3 |
3 |
| Ben-Gurion University of the Negev Research and Development Authority | 200 |
2 |
| Cameron International Corporation | 1342 |
2 |
| Other owners | 62 |