- 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 47/13 - 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 by electromagnetic energy, e.g. of radio frequency range
Patent holdings for IPC class E21B 47/13
Total number of patents in this class: 1141
10-year publication summary
67
|
63
|
51
|
55
|
87
|
102
|
164
|
152
|
92
|
24
|
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 |
263 |
Evolution Engineering Inc. | 313 |
73 |
Schlumberger Technology Corporation | 9690 |
70 |
Saudi Arabian Oil Company | 11322 |
58 |
Schlumberger Canada Limited | 6913 |
56 |
Services Petroliers Schlumberger | 5426 |
46 |
Schlumberger Technology B.v. | 4951 |
43 |
Baker Hughes Oilfield Operations, LLC | 1885 |
34 |
Merlin Technology, Inc. | 165 |
23 |
Metrol Technology Limited | 85 |
22 |
Baker Hughes Incorporated | 5689 |
20 |
Expro North Sea Limited | 215 |
20 |
Erdos Miller, Inc. | 35 |
19 |
Schlumberger Holdings Limited | 2947 |
17 |
Weatherford Technology Holdings, LLC | 2135 |
17 |
Prad Research and Development Limited | 2696 |
17 |
ExxonMobil Upstream Research Company | 2525 |
12 |
Black Diamond Oilfield Rentals LLC | 81 |
12 |
ConocoPhillips Company | 1657 |
9 |
Scientific Drilling International, Inc. | 161 |
9 |
Other owners | 301 |