- 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 12/04 - Drill bit protectors
Patent holdings for IPC class E21B 12/04
Total number of patents in this class: 28
10-year publication summary
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0
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1
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1
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2
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0
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3
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1
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3
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2
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1
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| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Schlumberger Technology Corporation | 11981 |
4 |
| Halliburton Energy Services, Inc. | 21296 |
4 |
| Smith International, Inc. | 683 |
2 |
| Schlumberger Canada Limited | 7621 |
1 |
| Schlumberger Technology B.v. | 5292 |
1 |
| Schlumberger Holdings Limited | 2659 |
1 |
| Baker Hughes Incorporated | 4865 |
1 |
| ExxonMobil Research And Engineering Company | 2389 |
1 |
| Caterpillar Inc. | 10343 |
1 |
| Frank's International, LLC | 239 |
1 |
| Prad Research and Development Limited | 2641 |
1 |
| Services Petroliers Schlumberger | 6029 |
1 |
| Southwest Petroleum University | 530 |
1 |
| Titan Torque Services Limited | 3 |
1 |
| Baker Hughes, a GE Company, LLC | 2019 |
1 |
| Varel International Ind., LLC | 41 |
1 |
| Chengdu Weiyi Petroleum Technology Co., Ltd. | 7 |
1 |
| XR Downhole, LLC | 12 |
1 |
| Samil Engineering & Construction Co.,Ltd | 25 |
1 |
| Sichuan Jiarui Technology Co., Ltd. | 5 |
1 |
| Other owners | 1 |