- 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 33/068 - Well headsSetting-up thereof having provision for introducing objects or fluids into, or removing objects from, wells
Patent holdings for IPC class E21B 33/068
Total number of patents in this class: 841
10-year publication summary
|
64
|
67
|
77
|
74
|
81
|
53
|
50
|
47
|
33
|
22
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Cameron International Corporation | 1342 |
83 |
| Saudi Arabian Oil Company | 13372 |
42 |
| Halliburton Energy Services, Inc. | 20946 |
41 |
| Schlumberger Technology Corporation | 10881 |
27 |
| Downing Wellhead Equipment, LLC | 50 |
23 |
| Schlumberger Canada Limited | 7366 |
22 |
| Oil States Energy Services, L.L.C. | 77 |
22 |
| Vault Pressure Control LLC | 69 |
19 |
| Schlumberger Technology B.v. | 5183 |
18 |
| Weatherford Technology Holdings, LLC | 2029 |
18 |
| Services Petroliers Schlumberger | 5828 |
18 |
| Wells Fargo Bank, National Association | 3952 |
18 |
| DYNAenergetics Europe GmbH | 252 |
17 |
| Cameron Technologies Limited | 215 |
15 |
| SPM Oil & Gas Inc. | 330 |
14 |
| Gulfstream Services, Inc. | 58 |
13 |
| FMC Technologies, Inc. | 609 |
12 |
| Isolation Equipment Services Inc. | 18 |
12 |
| Stream-Flo Industries Ltd. | 72 |
11 |
| Flowco Production Solutions, LLC | 67 |
9 |
| Other owners | 387 |