- 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 47/003 - Determining well or borehole volumes
Patent holdings for IPC class E21B 47/003
Total number of patents in this class: 173
10-year publication summary
5
|
6
|
6
|
12
|
24
|
29
|
17
|
10
|
15
|
0
|
2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Saudi Arabian Oil Company | 12423 |
20 |
Halliburton Energy Services, Inc. | 20419 |
19 |
Schlumberger Technology Corporation | 10241 |
17 |
Landmark Graphics Corporation | 1521 |
9 |
Chevron U.S.A. Inc. | 3854 |
9 |
Schlumberger Canada Limited | 7147 |
8 |
Services Petroliers Schlumberger | 5626 |
7 |
ExxonMobil Upstream Research Company | 2454 |
5 |
Schlumberger Technology B.v. | 5068 |
3 |
ConocoPhillips Company | 1677 |
3 |
Geoquest Systems B.V. | 681 |
3 |
Prad Research and Development Limited | 2696 |
3 |
SunCor Energy Inc. | 766 |
3 |
Equinor Energy AS | 488 |
3 |
Schlumberger Holdings Limited | 2867 |
2 |
Baker Hughes Incorporated | 5508 |
2 |
Aver Technologies, Inc. | 13 |
2 |
Four Flags Pty Ltd | 6 |
2 |
RS Energy Group Topco, Inc. CA | 16 |
2 |
Baker Hughes Holdings LLC | 3009 |
2 |
Other owners | 49 |