- 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 10/10 - Roller bits with roller axle supported at both ends
Patent holdings for IPC class E21B 10/10
Total number of patents in this class: 27
10-year publication summary
|
3
|
2
|
6
|
4
|
1
|
1
|
1
|
1
|
1
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21020 |
4 |
| Schlumberger Technology Corporation | 10957 |
3 |
| Sandvik Intellectual Property AB | 1470 |
3 |
| Sandvik Mining and Construction Tools AB | 175 |
2 |
| Schlumberger Canada Limited | 7403 |
1 |
| Schlumberger Technology B.v. | 5203 |
1 |
| Smith International, Inc. | 715 |
1 |
| Aramco Services Company | 4058 |
1 |
| Atlas Copco Secoroc LLC | 19 |
1 |
| Chiesi Farmaceutici S.p.A. | 976 |
1 |
| Herrenknecht AG | 203 |
1 |
| Mhwirth GmbH | 55 |
1 |
| Mitsubishi Materials Corporation | 2474 |
1 |
| Saudi Arabian Oil Company | 13512 |
1 |
| Services Petroliers Schlumberger | 5852 |
1 |
| Tu Bergakademie Freiberg | 13 |
1 |
| Hole Opener Corporation International | 6 |
1 |
| Chengdu Weiyi Petroleum Technology Co., Ltd. | 6 |
1 |
| Stu Blattner, Inc. | 1 |
1 |
| Other owners | 0 |