- 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 7/12 - Underwater drilling
Patent holdings for IPC class E21B 7/12
Total number of patents in this class: 520
10-year publication summary
|
39
|
37
|
31
|
18
|
11
|
15
|
5
|
8
|
7
|
3
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21006 |
25 |
| Cameron International Corporation | 1350 |
21 |
| Mako Rentals, Inc. | 60 |
18 |
| OneSubsea IP UK Limited | 423 |
15 |
| Hydril USA Distribution LLC | 213 |
13 |
| Itrec B.V. | 504 |
13 |
| Vetco Gray, LLC | 151 |
12 |
| Chevron U.S.A. Inc. | 4007 |
10 |
| ConocoPhillips Company | 1684 |
10 |
| Noble Drilling A/S | 50 |
10 |
| Schlumberger Technology Corporation | 10994 |
9 |
| Weatherford Technology Holdings, LLC | 2029 |
9 |
| Grant Prideco, Inc. | 396 |
8 |
| Schlumberger Canada Limited | 7410 |
7 |
| Schlumberger Technology B.v. | 5210 |
6 |
| Aker Solutions AS | 242 |
6 |
| BP Corporation North America Inc. | 747 |
6 |
| National Oilwell Varco, L.P. | 1695 |
6 |
| Services Petroliers Schlumberger | 5866 |
6 |
| Keppel Offshore & Marine Technology Centre Pte Ltd | 59 |
6 |
| Other owners | 304 |