- 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: 126
10-year publication summary
|
13
|
9
|
6
|
12
|
1
|
9
|
1
|
6
|
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 | 5247 |
16 |
| Smith International, Inc. | 717 |
8 |
| Tercel IP Limited | 37 |
6 |
| Halliburton Energy Services, Inc. | 20891 |
5 |
| Saudi Arabian Oil Company | 13155 |
5 |
| National Oilwell Varco, L.P. | 1671 |
4 |
| Schlumberger Canada Limited | 7296 |
3 |
| Schlumberger Technology B.v. | 5168 |
3 |
| Schlumberger Holdings Limited | 2828 |
3 |
| Bit Brokers International LTD | 6 |
3 |
| Dynomax Drilling Tools Inc. | 17 |
3 |
| Frank's International, LLC | 238 |
3 |
| Prad Research and Development Limited | 2693 |
3 |
| Quanta Associates, L.P. | 432 |
3 |
| Services Petroliers Schlumberger | 5788 |
3 |
| Hole Opener Corporation International | 6 |
3 |
| Engineering Innovation & Design Limited | 4 |
3 |
| Kennametal Inc. | 1386 |
2 |
| Chengdu Best Diamond Bit Co., Ltd. | 9 |
2 |
| European Drilling Projects B.V. | 8 |
2 |
| Other owners | 43 |