- 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 33/03 - Well heads; Setting-up thereof
Patent holdings for IPC class E21B 33/03
Total number of patents in this class: 944
10-year publication summary
|
127
|
108
|
101
|
64
|
72
|
63
|
48
|
60
|
34
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Cameron International Corporation | 1322 |
133 |
| Halliburton Energy Services, Inc. | 20403 |
38 |
| Saudi Arabian Oil Company | 12390 |
33 |
| Weatherford Technology Holdings, LLC | 2107 |
27 |
| Schlumberger Technology Corporation | 10217 |
26 |
| FMC Technologies, Inc. | 584 |
26 |
| Cameron Technologies Limited | 246 |
25 |
| Schlumberger Canada Limited | 7137 |
22 |
| S+s Industries Technology LLC | 24 |
19 |
| Schlumberger Technology B.v. | 5058 |
17 |
| Services Petroliers Schlumberger | 5616 |
17 |
| Vetco Gray, LLC | 154 |
17 |
| Vetco Gray Inc. | 152 |
16 |
| National Oilwell Varco, L.P. | 1624 |
15 |
| OneSubsea IP UK Limited | 400 |
15 |
| Baker Hughes Oilfield Operations, LLC | 2105 |
14 |
| Fhe USA LLC | 39 |
12 |
| Baker Hughes Incorporated | 5514 |
11 |
| Aramco Services Company | 3735 |
11 |
| Oil States Energy Services, L.L.C. | 75 |
11 |
| Other owners | 439 |