- 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: 857
10-year publication summary
|
40
|
42
|
45
|
78
|
75
|
82
|
94
|
71
|
76
|
33
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20862 |
194 |
| DYNAenergetics Europe GmbH | 246 |
61 |
| Schlumberger Technology Corporation | 10673 |
59 |
| Hunting Titan, Inc. | 245 |
54 |
| Schlumberger Canada Limited | 7283 |
32 |
| Saudi Arabian Oil Company | 12997 |
31 |
| Schlumberger Technology B.v. | 5164 |
25 |
| Services Petroliers Schlumberger | 5775 |
25 |
| Wells Fargo Bank, National Association | 3792 |
22 |
| ExxonMobil Upstream Research Company | 2406 |
21 |
| Geodynamics, Inc. | 191 |
21 |
| Dorf Ketal Chemicals FZE | 197 |
18 |
| G & H Diversified Manufacturing, LP, Edward Cannoy Kash, U.S. Citizen; Merry Janan Kash, U.S. Citizen | 69 |
17 |
| Schlumberger Holdings Limited | 2834 |
12 |
| Baker Hughes Incorporated | 5273 |
12 |
| Owen Oil Tools LP | 90 |
11 |
| Prad Research and Development Limited | 2693 |
11 |
| XConnect, LLC | 51 |
11 |
| GR Energy Services Management, LP | 43 |
9 |
| Baker Hughes Holdings LLC | 3004 |
9 |
| Other owners | 202 |