- 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: 851
10-year publication summary
|
80
|
96
|
90
|
95
|
62
|
59
|
50
|
40
|
34
|
5
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Cameron International Corporation | 1367 |
83 |
| Saudi Arabian Oil Company | 13956 |
44 |
| Halliburton Energy Services, Inc. | 21257 |
41 |
| Schlumberger Technology Corporation | 11584 |
28 |
| Downing Wellhead Equipment, LLC | 52 |
24 |
| Oil States Energy Services, L.L.C. | 77 |
22 |
| Schlumberger Canada Limited | 7588 |
21 |
| Weatherford Technology Holdings, LLC | 2072 |
19 |
| Vault Pressure Control LLC | 69 |
19 |
| Schlumberger Technology B.v. | 5282 |
18 |
| Services Petroliers Schlumberger | 5996 |
18 |
| Wells Fargo Bank, National Association | 4393 |
18 |
| DYNAenergetics Europe GmbH | 258 |
16 |
| Cameron Technologies Limited | 229 |
14 |
| SPM Oil & Gas Inc. | 358 |
14 |
| Gulfstream Services, Inc. | 58 |
13 |
| Isolation Equipment Services Inc. | 20 |
12 |
| Stream-Flo Industries Ltd. | 70 |
12 |
| FMC Technologies, Inc. | 610 |
11 |
| National Oilwell Varco, L.P. | 1690 |
9 |
| Other owners | 395 |