- 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 17/08 - Casing joints
Patent holdings for IPC class E21B 17/08
Total number of patents in this class: 602
10-year publication summary
49
|
61
|
49
|
57
|
42
|
56
|
38
|
50
|
28
|
10
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Halliburton Energy Services, Inc. | 20165 |
44 |
IFP Energies Nouvelles | 2717 |
16 |
National Oilwell Varco, L.P. | 1604 |
16 |
Weatherford Technology Holdings, LLC | 2135 |
15 |
Schlumberger Technology Corporation | 9690 |
14 |
Cameron International Corporation | 1305 |
13 |
Hydril Company | 111 |
12 |
Nippon Steel Corporation | 5649 |
12 |
Grant Prideco, Inc. | 384 |
11 |
Vetco Gray Inc. | 163 |
11 |
Baker Hughes Incorporated | 5689 |
10 |
Dril-Quip, Inc. | 155 |
10 |
Oil States Industries (UK) Limited | 45 |
9 |
Oil States Industries, Inc. | 61 |
8 |
Vallourec Oil and Gas France | 450 |
8 |
FMC Kongsberg Subsea AS | 251 |
7 |
NCS Multistage Inc. | 172 |
6 |
OneSubsea IP UK Limited | 378 |
6 |
Baker Hughes Oilfield Operations, LLC | 1885 |
6 |
ArcelorMittal Tubular Products Luxembourg S.A. | 10 |
5 |
Other owners | 363 |