- 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 33/03 - Well headsSetting-up thereof
Patent holdings for IPC class E21B 33/03
Total number of patents in this class: 973
10-year publication summary
|
86
|
74
|
52
|
55
|
53
|
35
|
53
|
39
|
32
|
4
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Cameron International Corporation | 1357 |
135 |
| Saudi Arabian Oil Company | 13886 |
50 |
| Halliburton Energy Services, Inc. | 21125 |
39 |
| Schlumberger Technology Corporation | 11326 |
29 |
| FMC Technologies, Inc. | 602 |
26 |
| Weatherford Technology Holdings, LLC | 2035 |
24 |
| Cameron Technologies Limited | 224 |
24 |
| Schlumberger Canada Limited | 7511 |
21 |
| S+s Industries Technology LLC | 24 |
19 |
| Schlumberger Technology B.v. | 5257 |
17 |
| Services Petroliers Schlumberger | 5940 |
17 |
| Vetco Gray Inc. | 142 |
16 |
| Vetco Gray, LLC | 150 |
16 |
| OneSubsea IP UK Limited | 431 |
15 |
| Aramco Services Company | 4157 |
14 |
| National Oilwell Varco, L.P. | 1702 |
14 |
| Baker Hughes Oilfield Operations, LLC | 2421 |
13 |
| Fhe USA LLC | 42 |
12 |
| Baker Hughes Incorporated | 5094 |
11 |
| Oil States Energy Services, L.L.C. | 77 |
11 |
| Other owners | 450 |