- 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 3/04 - Rotary tables
Patent holdings for IPC class E21B 3/04
Total number of patents in this class: 127
10-year publication summary
|
9
|
14
|
12
|
11
|
3
|
5
|
13
|
11
|
8
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Saudi Arabian Oil Company | 13904 |
13 |
| Optionx Holdings Pty Ltd | 14 |
9 |
| Pruitt Tool & Supply Co. | 73 |
7 |
| Schlumberger Technology Corporation | 11349 |
5 |
| West Drilling Products AS | 25 |
5 |
| Halliburton Energy Services, Inc. | 21144 |
4 |
| National Oilwell Varco, L.P. | 1701 |
4 |
| Baker Hughes Incorporated | 5088 |
3 |
| Drill Rig Spares Pty Ltd | 6 |
3 |
| Magnetic Variation Services, LLC | 40 |
3 |
| Nabors Drilling Technologies USA, Inc. | 568 |
3 |
| Soilmec S.p.A. | 74 |
3 |
| Tulsa Winch, Inc. | 15 |
3 |
| Baker Hughes Oilfield Operations, LLC | 2424 |
3 |
| The Charles Machine Works, Inc. | 415 |
2 |
| Doublebarrel Downhole Technologies LLC | 6 |
2 |
| Ensco International Incorporated | 56 |
2 |
| ITI Scotland Limited | 145 |
2 |
| Sandvik Intellectual Property AB | 1430 |
2 |
| Sandvik Mining and Construction Oy | 863 |
2 |
| Other owners | 47 |