- 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 47/003 - Determining well or borehole volumes
Patent holdings for IPC class E21B 47/003
Total number of patents in this class: 182
10-year publication summary
|
4
|
4
|
8
|
22
|
30
|
17
|
9
|
15
|
12
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Saudi Arabian Oil Company | 13857 |
25 |
| Schlumberger Technology Corporation | 11274 |
19 |
| Halliburton Energy Services, Inc. | 21098 |
19 |
| Landmark Graphics Corporation | 1510 |
12 |
| Chevron U.S.A. Inc. | 4048 |
10 |
| Schlumberger Canada Limited | 7487 |
8 |
| Services Petroliers Schlumberger | 5923 |
7 |
| ExxonMobil Upstream Research Company | 2358 |
5 |
| Schlumberger Technology B.v. | 5245 |
3 |
| ConocoPhillips Company | 1698 |
3 |
| Geoquest Systems B.V. | 814 |
3 |
| Prad Research and Development Limited | 2684 |
3 |
| SunCor Energy Inc. | 739 |
3 |
| Equinor Energy AS | 497 |
3 |
| Xecta Intelligent Production Services | 13 |
3 |
| Schlumberger Holdings Limited | 2754 |
2 |
| Baker Hughes Incorporated | 5109 |
2 |
| Aramco Services Company | 4157 |
2 |
| Aver Technologies, Inc. | 16 |
2 |
| Four Flags Pty Ltd | 7 |
2 |
| Other owners | 46 |