- 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: 854
10-year publication summary
40
|
42
|
45
|
78
|
75
|
82
|
94
|
71
|
76
|
31
|
2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Halliburton Energy Services, Inc. | 20835 |
193 |
DYNAenergetics Europe GmbH | 245 |
61 |
Schlumberger Technology Corporation | 10662 |
59 |
Hunting Titan, Inc. | 245 |
54 |
Schlumberger Canada Limited | 7273 |
32 |
Saudi Arabian Oil Company | 12947 |
31 |
Schlumberger Technology B.v. | 5161 |
25 |
Services Petroliers Schlumberger | 5772 |
25 |
Wells Fargo Bank, National Association | 3784 |
22 |
ExxonMobil Upstream Research Company | 2407 |
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 | 2835 |
12 |
Baker Hughes Incorporated | 5277 |
12 |
Owen Oil Tools LP | 90 |
11 |
Prad Research and Development Limited | 2693 |
11 |
XConnect, LLC | 49 |
11 |
GR Energy Services Management, LP | 43 |
9 |
Baker Hughes Holdings LLC | 3005 |
9 |
Other owners | 200 |