- 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: 391
10-year publication summary
|
39
|
32
|
27
|
24
|
18
|
21
|
16
|
5
|
9
|
5
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Schlumberger Technology Corporation | 10780 |
26 |
| Frank's International, LLC | 240 |
18 |
| Schlumberger Canada Limited | 7332 |
15 |
| Schlumberger Technology B.v. | 5176 |
15 |
| Services Petroliers Schlumberger | 5803 |
15 |
| Halliburton Energy Services, Inc. | 20911 |
14 |
| Cameron International Corporation | 1335 |
13 |
| Mhwirth AS | 130 |
13 |
| Baker Hughes Incorporated | 5274 |
10 |
| National Oilwell Varco, L.P. | 1682 |
10 |
| Nabors Drilling Technologies USA, Inc. | 561 |
9 |
| Schlumberger Holdings Limited | 2817 |
8 |
| Forum US, Inc. | 337 |
8 |
| Itrec B.V. | 504 |
8 |
| Prad Research and Development Limited | 2693 |
8 |
| Weatherford Technology Holdings, LLC | 2023 |
7 |
| Athabasca Oil Corporation | 21 |
7 |
| Tesco Corporation | 73 |
7 |
| Canrig Drilling Technology Ltd. | 72 |
5 |
| Nabors Industries, Inc. | 37 |
5 |
| Other owners | 170 |