- 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 19/06 - Elevators, i.e. rod- or tube-gripping devices
Patent holdings for IPC class E21B 19/06
Total number of patents in this class: 568
10-year publication summary
|
86
|
62
|
66
|
59
|
59
|
45
|
36
|
25
|
14
|
9
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Frank's International, LLC | 241 |
50 |
| Weatherford Technology Holdings, LLC | 2135 |
47 |
| Nabors Drilling Technologies USA, Inc. | 533 |
32 |
| National Oilwell Varco, L.P. | 1604 |
32 |
| Itrec B.V. | 477 |
28 |
| Noetic Technologies Inc. | 126 |
25 |
| Schlumberger Technology Corporation | 9690 |
18 |
| Canrig Robotic Technologies AS | 47 |
12 |
| Boart Longyear Company | 262 |
9 |
| Tesco Corporation | 73 |
8 |
| Forum US, Inc. | 315 |
7 |
| Mhwirth AS | 113 |
7 |
| Nabors Lux 2 SARL | 22 |
7 |
| Schlumberger Canada Limited | 6913 |
5 |
| Schlumberger Technology B.v. | 4951 |
5 |
| Cameron International Corporation | 1305 |
5 |
| Dril-Quip, Inc. | 155 |
5 |
| Services Petroliers Schlumberger | 5426 |
5 |
| Varco I/P, Inc. | 118 |
5 |
| Halliburton Energy Services, Inc. | 20165 |
4 |
| Other owners | 252 |