- 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 19/02 - Rod or cable suspensions
Patent holdings for IPC class E21B 19/02
Total number of patents in this class: 393
10-year publication summary
|
44
|
33
|
26
|
23
|
22
|
18
|
6
|
10
|
10
|
3
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Schlumberger Technology Corporation | 11798 |
26 |
| Frank's International, LLC | 239 |
18 |
| Schlumberger Canada Limited | 7606 |
15 |
| Schlumberger Technology B.v. | 5298 |
15 |
| Services Petroliers Schlumberger | 6024 |
15 |
| Halliburton Energy Services, Inc. | 21320 |
14 |
| Cameron International Corporation | 1368 |
13 |
| Mhwirth AS | 134 |
13 |
| Baker Hughes Incorporated | 4940 |
10 |
| National Oilwell Varco, L.P. | 1698 |
10 |
| Forum US, Inc. | 346 |
9 |
| Nabors Drilling Technologies USA, Inc. | 573 |
9 |
| Schlumberger Holdings Limited | 2702 |
8 |
| Itrec B.V. | 504 |
8 |
| Prad Research and Development Limited | 2662 |
8 |
| Weatherford Technology Holdings, LLC | 2154 |
7 |
| Athabasca Oil Corporation | 21 |
7 |
| Tesco Corporation | 73 |
7 |
| Canrig Drilling Technology Ltd. | 71 |
5 |
| Nabors Industries, Inc. | 37 |
5 |
| Other owners | 171 |