- 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 17/01 - Risers
Patent holdings for IPC class E21B 17/01
Total number of patents in this class: 1505
10-year publication summary
|
165
|
166
|
142
|
120
|
97
|
90
|
85
|
48
|
40
|
11
|
| 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 |
72 |
| Technip France | 737 |
70 |
| Cameron International Corporation | 1305 |
45 |
| Schlumberger Technology Corporation | 9690 |
33 |
| Grant Prideco, Inc. | 384 |
33 |
| Petroleo Brasileiro S.A. - Petrobras | 730 |
31 |
| Schlumberger Canada Limited | 6913 |
30 |
| Statoil Petroleum AS | 555 |
30 |
| Schlumberger Technology B.v. | 4951 |
28 |
| Services Petroliers Schlumberger | 5426 |
28 |
| Saipem S.A. | 223 |
27 |
| Chevron U.S.A. Inc. | 3774 |
26 |
| Weatherford Technology Holdings, LLC | 2135 |
26 |
| GE Oil & Gas UK Limited | 170 |
25 |
| Shell Internationale Research Maatschappij B.V. | 3792 |
23 |
| OneSubsea IP UK Limited | 378 |
22 |
| Schlumberger Holdings Limited | 2947 |
21 |
| Equinor Energy AS | 475 |
21 |
| Acergy France SAS | 124 |
20 |
| Mako Rentals, Inc. | 61 |
20 |
| Other owners | 874 |