- 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: 877
10-year publication summary
|
64
|
70
|
81
|
91
|
86
|
106
|
53
|
57
|
64
|
19
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21320 |
177 |
| Schlumberger Technology Corporation | 11798 |
84 |
| Hunting Titan, Inc. | 231 |
81 |
| DYNAenergetics Europe GmbH | 261 |
76 |
| Schlumberger Canada Limited | 7606 |
38 |
| Geodynamics, Inc. | 189 |
32 |
| Wells Fargo Bank, National Association | 4498 |
28 |
| Services Petroliers Schlumberger | 6024 |
25 |
| Schlumberger Technology B.v. | 5298 |
24 |
| G & H Diversified Manufacturing, LP, Edward Cannoy Kash, U.S. Citizen; Merry Janan Kash, U.S. Citizen | 82 |
24 |
| Saudi Arabian Oil Company | 14207 |
20 |
| Harrison Jet Guns II, L.P., Harrison Jet Guns Management Company, L.L.C., a Texas Limited Liability Company | 28 |
17 |
| Owen Oil Tools LP | 75 |
17 |
| XConnect, LLC | 59 |
14 |
| DYNAenergetics GmbH & Co. KG | 39 |
12 |
| Baker Hughes Incorporated | 4940 |
11 |
| GR Energy Services Management, LP | 42 |
11 |
| Schlumberger Holdings Limited | 2702 |
10 |
| Prad Research and Development Limited | 2662 |
10 |
| SWM International, LLC | 14 |
9 |
| Other owners | 157 |