- 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 47/12 - Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
Patent holdings for IPC class E21B 47/12
Total number of patents in this class: 5848
10-year publication summary
|
613
|
623
|
555
|
532
|
453
|
338
|
378
|
256
|
263
|
60
|
| 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 |
1329 |
| Schlumberger Technology Corporation | 9690 |
501 |
| Schlumberger Canada Limited | 6913 |
361 |
| Services Petroliers Schlumberger | 5426 |
313 |
| Schlumberger Technology B.v. | 4951 |
267 |
| Baker Hughes Incorporated | 5689 |
265 |
| Saudi Arabian Oil Company | 11322 |
245 |
| Baker Hughes, a GE Company, LLC | 2171 |
148 |
| Schlumberger Holdings Limited | 2947 |
137 |
| Prad Research and Development Limited | 2696 |
119 |
| Baker Hughes Oilfield Operations, LLC | 1885 |
107 |
| Weatherford Technology Holdings, LLC | 2135 |
103 |
| Evolution Engineering Inc. | 313 |
94 |
| Landmark Graphics Corporation | 1526 |
68 |
| Expro North Sea Limited | 215 |
47 |
| Metrol Technology Limited | 85 |
46 |
| Baker Hughes Holdings LLC | 3060 |
46 |
| ExxonMobil Upstream Research Company | 2525 |
42 |
| Geoquest Systems B.V. | 584 |
42 |
| Aramco Services Company | 3504 |
41 |
| Other owners | 1527 |