- 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: 965
10-year publication summary
|
106
|
86
|
74
|
52
|
55
|
53
|
35
|
52
|
39
|
29
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Cameron International Corporation | 1342 |
134 |
| Saudi Arabian Oil Company | 13428 |
49 |
| Halliburton Energy Services, Inc. | 20977 |
40 |
| Schlumberger Technology Corporation | 10914 |
29 |
| FMC Technologies, Inc. | 610 |
26 |
| Weatherford Technology Holdings, LLC | 2033 |
24 |
| Cameron Technologies Limited | 215 |
24 |
| Schlumberger Canada Limited | 7373 |
21 |
| S+s Industries Technology LLC | 24 |
19 |
| Schlumberger Technology B.v. | 5189 |
17 |
| Services Petroliers Schlumberger | 5835 |
17 |
| Vetco Gray, LLC | 149 |
17 |
| Vetco Gray Inc. | 148 |
16 |
| OneSubsea IP UK Limited | 423 |
15 |
| Baker Hughes Oilfield Operations, LLC | 2334 |
14 |
| Aramco Services Company | 4039 |
13 |
| National Oilwell Varco, L.P. | 1690 |
13 |
| Fhe USA LLC | 40 |
12 |
| Baker Hughes Incorporated | 5243 |
11 |
| Oil States Energy Services, L.L.C. | 77 |
11 |
| Other owners | 443 |