- 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: 904
10-year publication summary
|
42
|
45
|
78
|
75
|
82
|
94
|
72
|
80
|
57
|
14
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21257 |
196 |
| DYNAenergetics Europe GmbH | 258 |
69 |
| Schlumberger Technology Corporation | 11584 |
65 |
| Hunting Titan, Inc. | 234 |
53 |
| Schlumberger Canada Limited | 7588 |
36 |
| Saudi Arabian Oil Company | 13956 |
35 |
| Schlumberger Technology B.v. | 5282 |
27 |
| Services Petroliers Schlumberger | 5996 |
27 |
| Geodynamics, Inc. | 194 |
22 |
| Wells Fargo Bank, National Association | 4393 |
22 |
| ExxonMobil Upstream Research Company | 2331 |
21 |
| G & H Diversified Manufacturing, LP, Edward Cannoy Kash, U.S. Citizen; Merry Janan Kash, U.S. Citizen | 78 |
18 |
| Dorf Ketal Chemicals FZE | 197 |
18 |
| Baker Hughes Incorporated | 5018 |
12 |
| XConnect, LLC | 55 |
12 |
| Schlumberger Holdings Limited | 2724 |
11 |
| Owen Oil Tools LP | 75 |
11 |
| Prad Research and Development Limited | 2678 |
11 |
| GR Energy Services Management, LP | 42 |
9 |
| Baker Hughes Holdings LLC | 2986 |
9 |
| Other owners | 220 |