- 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 43/117 - Shaped-charge perforators
Patent holdings for IPC class E21B 43/117
Total number of patents in this class: 827
10-year publication summary
|
53
|
64
|
70
|
81
|
91
|
86
|
105
|
53
|
54
|
27
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20835 |
166 |
| Hunting Titan, Inc. | 245 |
83 |
| Schlumberger Technology Corporation | 10662 |
74 |
| DYNAenergetics Europe GmbH | 245 |
71 |
| Schlumberger Canada Limited | 7273 |
35 |
| Geodynamics, Inc. | 191 |
32 |
| Wells Fargo Bank, National Association | 3784 |
28 |
| Services Petroliers Schlumberger | 5772 |
23 |
| Schlumberger Technology B.v. | 5161 |
22 |
| Owen Oil Tools LP | 90 |
22 |
| G & H Diversified Manufacturing, LP, Edward Cannoy Kash, U.S. Citizen; Merry Janan Kash, U.S. Citizen | 69 |
21 |
| Saudi Arabian Oil Company | 12947 |
15 |
| Harrison Jet Guns II, L.P., Harrison Jet Guns Management Company, L.L.C., a Texas Limited Liability Company | 24 |
14 |
| Baker Hughes Incorporated | 5277 |
12 |
| DYNAenergetics GmbH & Co. KG | 40 |
12 |
| XConnect, LLC | 49 |
12 |
| GR Energy Services Management, LP | 43 |
11 |
| Schlumberger Holdings Limited | 2835 |
10 |
| Prad Research and Development Limited | 2693 |
10 |
| Expro Americas, LLC | 51 |
8 |
| Other owners | 146 |