- 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 47/001 - Survey of boreholes or wells for underwater installations
Patent holdings for IPC class E21B 47/001
Total number of patents in this class: 132
10-year publication summary
|
0
|
8
|
3
|
10
|
1
|
14
|
22
|
15
|
16
|
8
|
| 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 |
13 |
| Schlumberger Technology Corporation | 9690 |
10 |
| Schlumberger Canada Limited | 6913 |
7 |
| Services Petroliers Schlumberger | 5426 |
7 |
| OneSubsea IP UK Limited | 378 |
5 |
| Schlumberger Technology B.v. | 4951 |
4 |
| Chevron U.S.A. Inc. | 3774 |
4 |
| Petroleo Brasileiro S.A. - Petrobras | 730 |
4 |
| Geoquest Systems B.V. | 584 |
3 |
| Transocean Sedco Forex Ventures Limited | 96 |
3 |
| Equinor Energy AS | 475 |
3 |
| Astro Technology Group, LLC | 17 |
3 |
| Schlumberger Holdings Limited | 2947 |
2 |
| ConocoPhillips Company | 1657 |
2 |
| Dril-Quip, Inc. | 155 |
2 |
| Huaneng Clean Energy Research Institute | 345 |
2 |
| Metrol Technology Limited | 85 |
2 |
| Oceaneering International, Inc. | 413 |
2 |
| Prad Research and Development Limited | 2696 |
2 |
| Trelleborg Offshore UK Limited | 20 |
2 |
| Other owners | 50 |