- 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: 2590
10-year publication summary
|
216
|
222
|
194
|
189
|
167
|
189
|
158
|
162
|
187
|
116
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21305 |
410 |
| Schlumberger Technology Corporation | 11839 |
226 |
| Saudi Arabian Oil Company | 14275 |
94 |
| The Charles Machine Works, Inc. | 418 |
82 |
| Vermeer Manufacturing Company | 674 |
82 |
| Schlumberger Canada Limited | 7609 |
76 |
| Merlin Technology, Inc. | 168 |
75 |
| Motive Drilling Technologies, Inc. | 104 |
63 |
| Services Petroliers Schlumberger | 6028 |
57 |
| Tracto-Technik GmbH & Co. KG | 170 |
46 |
| Nabors Drilling Technologies USA, Inc. | 573 |
42 |
| Schlumberger Technology B.v. | 5295 |
40 |
| Baker Hughes, a GE Company, LLC | 2051 |
32 |
| Baker Hughes Incorporated | 4922 |
31 |
| Landmark Graphics Corporation | 1505 |
29 |
| Evolution Engineering Inc. | 301 |
21 |
| Magnetic Variation Services, LLC | 40 |
21 |
| Baker Hughes Oilfield Operations, LLC | 2534 |
21 |
| Geoquest Systems B.V. | 879 |
18 |
| Scientific Drilling International, Inc. | 172 |
18 |
| Other owners | 1106 |