- 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: 954
10-year publication summary
|
127
|
108
|
100
|
63
|
72
|
64
|
50
|
63
|
41
|
26
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Cameron International Corporation | 1332 |
133 |
| Saudi Arabian Oil Company | 13185 |
44 |
| Halliburton Energy Services, Inc. | 20901 |
38 |
| Schlumberger Technology Corporation | 10727 |
29 |
| FMC Technologies, Inc. | 604 |
26 |
| Weatherford Technology Holdings, LLC | 2023 |
24 |
| Cameron Technologies Limited | 211 |
23 |
| Schlumberger Canada Limited | 7296 |
20 |
| S+s Industries Technology LLC | 24 |
19 |
| Schlumberger Technology B.v. | 5165 |
17 |
| Services Petroliers Schlumberger | 5787 |
17 |
| Vetco Gray, LLC | 152 |
17 |
| Vetco Gray Inc. | 151 |
16 |
| OneSubsea IP UK Limited | 420 |
15 |
| Baker Hughes Oilfield Operations, LLC | 2305 |
14 |
| National Oilwell Varco, L.P. | 1669 |
13 |
| Aramco Services Company | 3976 |
12 |
| Fhe USA LLC | 41 |
12 |
| Baker Hughes Incorporated | 5241 |
11 |
| Oil States Energy Services, L.L.C. | 76 |
11 |
| Other owners | 443 |