- 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 7/16 - Applying separate balls or pellets by the pressure of the drill, so-called shot-drilling
Patent holdings for IPC class E21B 7/16
Total number of patents in this class: 27
10-year publication summary
|
1
|
3
|
3
|
1
|
2
|
0
|
2
|
3
|
1
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hypersciences, Inc. | 42 |
8 |
| PDTI Holdings, LLC | 17 |
5 |
| Defiant Engineering, LLC | 32 |
4 |
| Halliburton Energy Services, Inc. | 20924 |
2 |
| Chevron U.S.A. Inc. | 3972 |
2 |
| SDG, LLC | 57 |
2 |
| China Railway Engineering Equipment Group Co., Ltd. | 46 |
1 |
| Framatome ANP | 90 |
1 |
| Ccdc Petroleum Drilling & Production Technology Co., Ltd | 6 |
1 |
| Hochschule Bochum | 5 |
1 |
| Other owners | 0 |