- 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: 6097
10-year publication summary
|
622
|
554
|
528
|
446
|
334
|
380
|
259
|
276
|
225
|
124
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20908 |
1399 |
| Schlumberger Technology Corporation | 10745 |
543 |
| Schlumberger Canada Limited | 7298 |
385 |
| Services Petroliers Schlumberger | 5788 |
334 |
| Schlumberger Technology B.v. | 5163 |
282 |
| Saudi Arabian Oil Company | 13206 |
280 |
| Baker Hughes Incorporated | 5238 |
252 |
| Baker Hughes, a GE Company, LLC | 2112 |
147 |
| Schlumberger Holdings Limited | 2819 |
126 |
| Prad Research and Development Limited | 2693 |
119 |
| Baker Hughes Oilfield Operations, LLC | 2313 |
109 |
| Weatherford Technology Holdings, LLC | 2024 |
94 |
| Evolution Engineering Inc. | 301 |
92 |
| Landmark Graphics Corporation | 1525 |
75 |
| Aramco Services Company | 3981 |
49 |
| Geoquest Systems B.V. | 752 |
48 |
| Expro North Sea Limited | 231 |
46 |
| Baker Hughes Holdings LLC | 3005 |
46 |
| Metrol Technology Limited | 85 |
43 |
| ExxonMobil Upstream Research Company | 2394 |
42 |
| Other owners | 1586 |