- 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 47/001 - Survey of boreholes or wells for underwater installations
Patent holdings for IPC class E21B 47/001
Total number of patents in this class: 154
10-year publication summary
|
8
|
3
|
11
|
1
|
14
|
22
|
15
|
19
|
22
|
7
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20879 |
14 |
| Schlumberger Technology Corporation | 10705 |
12 |
| Schlumberger Canada Limited | 7293 |
10 |
| Services Petroliers Schlumberger | 5784 |
7 |
| Chevron U.S.A. Inc. | 3953 |
6 |
| OneSubsea IP UK Limited | 419 |
6 |
| Petroleo Brasileiro S.A. - Petrobras | 844 |
5 |
| Astro Technology Group, LLC | 21 |
5 |
| Schlumberger Technology B.v. | 5166 |
4 |
| Transocean Sedco Forex Ventures Limited | 43 |
4 |
| Geoquest Systems B.V. | 744 |
3 |
| Equinor Energy AS | 492 |
3 |
| Ouro Negro Tecnologias EM Equipamentos Industriais S/A | 20 |
3 |
| Schlumberger Holdings Limited | 2831 |
2 |
| ConocoPhillips Company | 1673 |
2 |
| FMC Technologies, Inc. | 602 |
2 |
| Huaneng Clean Energy Research Institute | 432 |
2 |
| Metrol Technology Limited | 84 |
2 |
| Oceaneering International, Inc. | 424 |
2 |
| Prad Research and Development Limited | 2693 |
2 |
| Other owners | 58 |