- 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 7/12 - Underwater drilling
Patent holdings for IPC class E21B 7/12
Total number of patents in this class: 547
10-year publication summary
|
70
|
43
|
42
|
34
|
18
|
15
|
16
|
5
|
6
|
2
|
| 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 |
26 |
| Cameron International Corporation | 1305 |
22 |
| Mako Rentals, Inc. | 61 |
18 |
| Itrec B.V. | 477 |
15 |
| OneSubsea IP UK Limited | 378 |
14 |
| Vetco Gray, LLC | 161 |
14 |
| Hydril USA Distribution LLC | 206 |
12 |
| Schlumberger Technology Corporation | 9690 |
10 |
| Chevron U.S.A. Inc. | 3774 |
10 |
| Weatherford Technology Holdings, LLC | 2135 |
10 |
| ConocoPhillips Company | 1657 |
10 |
| Noble Drilling A/S | 49 |
10 |
| Grant Prideco, Inc. | 384 |
8 |
| Schlumberger Canada Limited | 6913 |
7 |
| ExxonMobil Upstream Research Company | 2525 |
7 |
| Schlumberger Technology B.v. | 4951 |
6 |
| Aker Solutions AS | 226 |
6 |
| BP Corporation North America Inc. | 776 |
6 |
| National Oilwell Varco, L.P. | 1604 |
6 |
| Services Petroliers Schlumberger | 5426 |
6 |
| Other owners | 324 |