- 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 10/20 - Roller bits characterised by detachable or adjustable parts, e.g. legs or axles
Patent holdings for IPC class E21B 10/20
Total number of patents in this class: 72
10-year publication summary
|
10
|
4
|
7
|
12
|
7
|
4
|
0
|
1
|
0
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Baker Hughes Incorporated | 4883 |
8 |
| Baker Hughes Holdings LLC | 3010 |
8 |
| Halliburton Energy Services, Inc. | 21292 |
6 |
| Schlumberger Technology Corporation | 11940 |
4 |
| Boart Longyear Company | 116 |
4 |
| Veracio Ltd. | 75 |
4 |
| Schlumberger Canada Limited | 7610 |
3 |
| Century Products, Inc. | 4 |
3 |
| Schlumberger Technology B.v. | 5287 |
2 |
| Betek GmbH & Co. KG | 158 |
2 |
| Bouygues Travaux Publics | 29 |
2 |
| National Oilwell DHT, L.P. | 117 |
2 |
| NOV Downhole Eurasia Limited | 46 |
2 |
| Services Petroliers Schlumberger | 6022 |
2 |
| Transco Manufacturing Australia Pty Ltd | 6 |
2 |
| Ulterra Drilling Technologies, L.P. | 129 |
2 |
| Baker Hughes, a GE Company, LLC | 2022 |
2 |
| Shell Internationale Research Maatschappij B.V. | 3390 |
1 |
| Shell Canada Limited | 48 |
1 |
| Smith International, Inc. | 690 |
1 |
| Other owners | 11 |