- 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 7/04 - Directional drilling
Patent holdings for IPC class E21B 7/04
Total number of patents in this class: 2449
10-year publication summary
|
200
|
190
|
195
|
178
|
178
|
158
|
176
|
145
|
151
|
161
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21078 |
410 |
| Schlumberger Technology Corporation | 11054 |
194 |
| Saudi Arabian Oil Company | 13656 |
85 |
| The Charles Machine Works, Inc. | 410 |
82 |
| Vermeer Manufacturing Company | 649 |
73 |
| Merlin Technology, Inc. | 163 |
71 |
| Schlumberger Canada Limited | 7432 |
62 |
| Motive Drilling Technologies, Inc. | 103 |
62 |
| Services Petroliers Schlumberger | 5884 |
49 |
| Tracto-Technik GmbH & Co. KG | 169 |
43 |
| Nabors Drilling Technologies USA, Inc. | 564 |
42 |
| Schlumberger Technology B.v. | 5223 |
39 |
| Baker Hughes Incorporated | 5175 |
32 |
| Baker Hughes, a GE Company, LLC | 2106 |
32 |
| Landmark Graphics Corporation | 1515 |
29 |
| Evolution Engineering Inc. | 300 |
21 |
| Magnetic Variation Services, LLC | 38 |
19 |
| Scientific Drilling International, Inc. | 169 |
18 |
| Baker Hughes Holdings LLC | 3002 |
18 |
| Schlumberger Holdings Limited | 2790 |
17 |
| Other owners | 1051 |