- 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 43/116 - Gun or shaped-charge perforators
Patent holdings for IPC class E21B 43/116
Total number of patents in this class: 912
10-year publication summary
|
77
|
58
|
69
|
65
|
81
|
65
|
38
|
57
|
41
|
7
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21217 |
205 |
| Schlumberger Technology Corporation | 11485 |
67 |
| Hunting Titan, Inc. | 234 |
51 |
| Schlumberger Canada Limited | 7558 |
34 |
| Geodynamics, Inc. | 195 |
34 |
| DYNAenergetics Europe GmbH | 258 |
31 |
| Schlumberger Technology B.v. | 5267 |
26 |
| Services Petroliers Schlumberger | 5977 |
26 |
| Wells Fargo Bank, National Association | 4371 |
25 |
| Baker Hughes Incorporated | 5041 |
23 |
| Baker Hughes Holdings LLC | 2992 |
19 |
| Dorf Ketal Chemicals FZE | 202 |
18 |
| ExxonMobil Upstream Research Company | 2335 |
17 |
| Schlumberger Holdings Limited | 2735 |
16 |
| Prad Research and Development Limited | 2679 |
16 |
| Harrison Jet Guns II, L.P., Harrison Jet Guns Management Company, L.L.C., a Texas Limited Liability Company | 28 |
15 |
| Saudi Arabian Oil Company | 13953 |
14 |
| Owen Oil Tools LP | 77 |
13 |
| XConnect, LLC | 55 |
13 |
| G & H Diversified Manufacturing, LP, Edward Cannoy Kash, U.S. Citizen; Merry Janan Kash, U.S. Citizen | 77 |
12 |
| Other owners | 237 |