- 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 43/119 - Details, e.g. for locating perforating place or direction
Patent holdings for IPC class E21B 43/119
Total number of patents in this class: 878
10-year publication summary
|
33
|
35
|
39
|
67
|
65
|
74
|
81
|
61
|
76
|
42
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20946 |
196 |
| DYNAenergetics Europe GmbH | 252 |
65 |
| Schlumberger Technology Corporation | 10881 |
63 |
| Hunting Titan, Inc. | 247 |
54 |
| Schlumberger Canada Limited | 7366 |
35 |
| Saudi Arabian Oil Company | 13372 |
32 |
| Schlumberger Technology B.v. | 5183 |
27 |
| Services Petroliers Schlumberger | 5828 |
27 |
| Wells Fargo Bank, National Association | 3952 |
22 |
| ExxonMobil Upstream Research Company | 2392 |
21 |
| Geodynamics, Inc. | 193 |
21 |
| Dorf Ketal Chemicals FZE | 199 |
18 |
| G & H Diversified Manufacturing, LP, Edward Cannoy Kash, U.S. Citizen; Merry Janan Kash, U.S. Citizen | 70 |
17 |
| Schlumberger Holdings Limited | 2803 |
12 |
| Baker Hughes Incorporated | 5248 |
12 |
| Owen Oil Tools LP | 90 |
11 |
| Prad Research and Development Limited | 2692 |
11 |
| XConnect, LLC | 54 |
11 |
| GR Energy Services Management, LP | 41 |
9 |
| Baker Hughes Holdings LLC | 3001 |
9 |
| Other owners | 205 |