- All sections
- E - Fixed constructions
- E21B - Earth or rock drilling; obtaining 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: 75
10-year publication summary
|
11
|
3
|
10
|
4
|
7
|
12
|
7
|
4
|
0
|
1
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Baker Hughes Incorporated | 5689 |
9 |
| Baker Hughes Holdings LLC | 3060 |
8 |
| Halliburton Energy Services, Inc. | 20165 |
6 |
| Ulterra Drilling Technologies, L.P. | 124 |
4 |
| Boart Longyear Company | 262 |
4 |
| Veracio Ltd. | 40 |
4 |
| Schlumberger Technology Corporation | 9690 |
3 |
| Schlumberger Canada Limited | 6913 |
3 |
| Century Products, Inc. | 21 |
3 |
| National Oilwell DHT, L.P. | 159 |
3 |
| Betek GmbH & Co. KG | 140 |
2 |
| Bouygues Travaux Publics | 30 |
2 |
| NOV Downhole Eurasia Limited | 46 |
2 |
| Transco Manufacturing Australia Pty Ltd | 8 |
2 |
| Baker Hughes, a GE Company, LLC | 2171 |
2 |
| Schlumberger Technology B.v. | 4951 |
1 |
| Shell Internationale Research Maatschappij B.V. | 3792 |
1 |
| Shell Canada Limited | 139 |
1 |
| Weatherford Technology Holdings, LLC | 2135 |
1 |
| Smith International, Inc. | 761 |
1 |
| Other owners | 13 |