- 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: 1518
10-year publication summary
|
156
|
138
|
109
|
88
|
85
|
80
|
46
|
43
|
47
|
15
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20911 |
71 |
| Technip France | 706 |
67 |
| Cameron International Corporation | 1335 |
44 |
| Petroleo Brasileiro S.A. - Petrobras | 855 |
37 |
| Schlumberger Technology Corporation | 10780 |
33 |
| Grant Prideco, Inc. | 385 |
33 |
| Schlumberger Canada Limited | 7332 |
31 |
| Schlumberger Technology B.v. | 5176 |
29 |
| Services Petroliers Schlumberger | 5803 |
29 |
| Saipem S.A. | 229 |
27 |
| Chevron U.S.A. Inc. | 3967 |
26 |
| Statoil Petroleum AS | 524 |
25 |
| OneSubsea IP UK Limited | 421 |
24 |
| Mako Rentals, Inc. | 60 |
23 |
| GE Oil & Gas UK Limited | 160 |
22 |
| Equinor Energy AS | 498 |
22 |
| Schlumberger Holdings Limited | 2817 |
21 |
| Weatherford Technology Holdings, LLC | 2023 |
21 |
| Shell Internationale Research Maatschappij B.V. | 3548 |
20 |
| Prad Research and Development Limited | 2693 |
20 |
| Other owners | 893 |