- All sections
- E - Fixed constructions
- E21B - Earth or rock drilling; obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B 33/068 - Well heads; Setting-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: 824
10-year publication summary
|
60
|
94
|
80
|
96
|
90
|
95
|
61
|
55
|
45
|
14
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Cameron International Corporation | 1305 |
86 |
| Halliburton Energy Services, Inc. | 20165 |
41 |
| Saudi Arabian Oil Company | 11322 |
35 |
| Schlumberger Technology Corporation | 9690 |
24 |
| Schlumberger Canada Limited | 6913 |
24 |
| Cameron Technologies Limited | 229 |
23 |
| Oil States Energy Services, L.L.C. | 79 |
22 |
| Schlumberger Technology B.v. | 4951 |
19 |
| Services Petroliers Schlumberger | 5426 |
19 |
| Wells Fargo Bank, National Association | 2945 |
19 |
| Vault Pressure Control LLC | 71 |
19 |
| Weatherford Technology Holdings, LLC | 2135 |
18 |
| Downing Wellhead Equipment, LLC | 42 |
18 |
| FMC Technologies, Inc. | 603 |
16 |
| DYNAenergetics Europe GmbH | 205 |
14 |
| SPM Oil & Gas Inc. | 304 |
14 |
| Gulfstream Services, Inc. | 53 |
12 |
| Isolation Equipment Services Inc. | 19 |
11 |
| Innovex Downhole Solutions, Inc. | 182 |
10 |
| National Oilwell Varco, L.P. | 1604 |
9 |
| Other owners | 371 |