- All sections
- E - Fixed constructions
- E21B - Earth or rock drilling; obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B 7/04 - Directional drilling
Patent holdings for IPC class E21B 7/04
Total number of patents in this class: 2162
10-year publication summary
155
|
224
|
216
|
222
|
194
|
185
|
162
|
182
|
136
|
45
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Halliburton Energy Services, Inc. | 20165 |
380 |
Schlumberger Technology Corporation | 9690 |
150 |
The Charles Machine Works, Inc. | 411 |
77 |
Saudi Arabian Oil Company | 11322 |
67 |
Merlin Technology, Inc. | 165 |
64 |
Vermeer Manufacturing Company | 615 |
61 |
Motive Drilling Technologies, Inc. | 89 |
47 |
Schlumberger Canada Limited | 6913 |
46 |
Tracto-Technik GmbH & Co. KG | 166 |
42 |
Nabors Drilling Technologies USA, Inc. | 533 |
39 |
Baker Hughes Incorporated | 5689 |
33 |
Services Petroliers Schlumberger | 5426 |
32 |
Baker Hughes, a GE Company, LLC | 2171 |
32 |
Schlumberger Technology B.v. | 4951 |
30 |
Landmark Graphics Corporation | 1526 |
28 |
Baker Hughes Holdings LLC | 3060 |
22 |
Evolution Engineering Inc. | 313 |
21 |
Scientific Drilling International, Inc. | 161 |
18 |
Schlumberger Holdings Limited | 2947 |
17 |
Prad Research and Development Limited | 2696 |
17 |
Other owners | 939 |