- 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 10/30 - Longitudinal axis roller reamers, e.g. reamer stabilisers
Patent holdings for IPC class E21B 10/30
Total number of patents in this class: 124
10-year publication summary
|
11
|
8
|
6
|
11
|
1
|
9
|
1
|
3
|
2
|
1
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Baker Hughes Incorporated | 5236 |
16 |
| Smith International, Inc. | 715 |
8 |
| Tercel IP Limited | 37 |
6 |
| Halliburton Energy Services, Inc. | 21002 |
5 |
| Saudi Arabian Oil Company | 13472 |
5 |
| National Oilwell Varco, L.P. | 1686 |
4 |
| Schlumberger Canada Limited | 7396 |
3 |
| Schlumberger Technology B.v. | 5201 |
3 |
| Schlumberger Holdings Limited | 2799 |
3 |
| Bit Brokers International LTD | 6 |
3 |
| Dynomax Drilling Tools Inc. | 18 |
3 |
| Frank's International, LLC | 240 |
3 |
| Prad Research and Development Limited | 2690 |
3 |
| Quanta Associates, L.P. | 426 |
3 |
| Services Petroliers Schlumberger | 5850 |
3 |
| Hole Opener Corporation International | 6 |
3 |
| Engineering Innovation & Design Limited | 4 |
3 |
| Chengdu Best Diamond Bit Co., Ltd. | 7 |
2 |
| European Drilling Projects B.V. | 8 |
2 |
| National Oilwell DHT, L.P. | 123 |
2 |
| Other owners | 41 |