- 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 17/01 - Risers
Patent holdings for IPC class E21B 17/01
Total number of patents in this class: 1526
10-year publication summary
|
142
|
120
|
97
|
90
|
86
|
49
|
47
|
52
|
26
|
21
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21257 |
70 |
| Technip France | 688 |
67 |
| Cameron International Corporation | 1367 |
44 |
| Petroleo Brasileiro S.A. - Petrobras | 947 |
39 |
| Schlumberger Technology Corporation | 11584 |
34 |
| Grant Prideco, Inc. | 434 |
33 |
| Schlumberger Canada Limited | 7588 |
31 |
| Schlumberger Technology B.v. | 5282 |
30 |
| Services Petroliers Schlumberger | 5996 |
30 |
| Saipem S.A. | 229 |
27 |
| Chevron U.S.A. Inc. | 4117 |
26 |
| OneSubsea IP UK Limited | 433 |
24 |
| Statoil Petroleum AS | 473 |
24 |
| Equinor Energy AS | 495 |
22 |
| Schlumberger Holdings Limited | 2724 |
21 |
| Weatherford Technology Holdings, LLC | 2072 |
21 |
| Prad Research and Development Limited | 2678 |
20 |
| Shell Internationale Research Maatschappij B.V. | 3437 |
19 |
| Baker Hughes Energy Technology UK Limited | 260 |
19 |
| Magma Global Limited | 54 |
18 |
| Other owners | 907 |