- 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 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: 575
10-year publication summary
|
66
|
59
|
59
|
46
|
36
|
25
|
16
|
21
|
21
|
14
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Frank's International, LLC | 239 |
49 |
| Weatherford Technology Holdings, LLC | 2162 |
40 |
| Nabors Drilling Technologies USA, Inc. | 575 |
33 |
| National Oilwell Varco, L.P. | 1702 |
31 |
| Itrec B.V. | 504 |
29 |
| Noetic Technologies Inc. | 132 |
24 |
| Schlumberger Technology Corporation | 11857 |
19 |
| Canrig Robotic Technologies AS | 55 |
12 |
| Tesco Corporation | 73 |
8 |
| Boart Longyear Manufacturing and Distribution Inc. | 126 |
8 |
| Forum US, Inc. | 348 |
7 |
| Mhwirth AS | 133 |
7 |
| Nabors Lux 2 SARL | 21 |
7 |
| Grant Prideco, Inc. | 446 |
6 |
| Vallourec Oil and Gas France | 454 |
6 |
| Helmerich & Payne Technologies, LLC | 114 |
6 |
| Schlumberger Canada Limited | 7613 |
5 |
| Schlumberger Technology B.v. | 5297 |
5 |
| Cameron International Corporation | 1365 |
5 |
| McCoy Global Inc. | 46 |
5 |
| Other owners | 263 |