- 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 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: 6316
10-year publication summary
|
556
|
532
|
451
|
336
|
384
|
259
|
281
|
240
|
227
|
97
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21320 |
1433 |
| Schlumberger Technology Corporation | 11798 |
595 |
| Schlumberger Canada Limited | 7606 |
408 |
| Services Petroliers Schlumberger | 6024 |
356 |
| Schlumberger Technology B.v. | 5298 |
298 |
| Saudi Arabian Oil Company | 14207 |
291 |
| Baker Hughes Incorporated | 4940 |
248 |
| Baker Hughes, a GE Company, LLC | 2057 |
145 |
| Schlumberger Holdings Limited | 2702 |
126 |
| Prad Research and Development Limited | 2662 |
119 |
| Baker Hughes Oilfield Operations, LLC | 2521 |
117 |
| Weatherford Technology Holdings, LLC | 2154 |
97 |
| Evolution Engineering Inc. | 301 |
92 |
| Landmark Graphics Corporation | 1508 |
79 |
| Geoquest Systems B.V. | 871 |
54 |
| Aramco Services Company | 4188 |
51 |
| Baker Hughes Holdings LLC | 3023 |
46 |
| Metrol Technology Limited | 89 |
43 |
| ExxonMobil Upstream Research Company | 2306 |
42 |
| Merlin Technology, Inc. | 168 |
42 |
| Other owners | 1634 |