- 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 47/14 - 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 using acoustic waves
Patent holdings for IPC class E21B 47/14
Total number of patents in this class: 875
10-year publication summary
|
62
|
63
|
74
|
77
|
70
|
93
|
50
|
70
|
38
|
15
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20835 |
220 |
| Schlumberger Technology Corporation | 10662 |
80 |
| Schlumberger Canada Limited | 7273 |
45 |
| ExxonMobil Upstream Research Company | 2407 |
39 |
| Baker Hughes Oilfield Operations, LLC | 2288 |
37 |
| Services Petroliers Schlumberger | 5772 |
35 |
| Schlumberger Technology B.v. | 5161 |
33 |
| Saudi Arabian Oil Company | 12947 |
30 |
| Baker Hughes Incorporated | 5277 |
21 |
| Baker Hughes, a GE Company, LLC | 2114 |
18 |
| Metrol Technology Limited | 84 |
14 |
| Schlumberger Holdings Limited | 2835 |
13 |
| Weatherford Technology Holdings, LLC | 2015 |
13 |
| Prad Research and Development Limited | 2693 |
12 |
| Evolution Engineering Inc. | 301 |
10 |
| Expro North Sea Limited | 230 |
7 |
| Institute of Geology and Geophysics, Chinese Academy of Sciences | 324 |
7 |
| Aramco Services Company | 3929 |
6 |
| Acoustic Data Limited | 16 |
6 |
| Lytt Limited | 50 |
6 |
| Other owners | 223 |