- 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 47/18 - 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 through the well fluid
Patent holdings for IPC class E21B 47/18
Total number of patents in this class: 1299
10-year publication summary
|
132
|
135
|
98
|
71
|
82
|
86
|
72
|
44
|
48
|
39
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21338 |
336 |
| Schlumberger Technology Corporation | 11818 |
138 |
| Evolution Engineering Inc. | 301 |
93 |
| Schlumberger Canada Limited | 7606 |
44 |
| Baker Hughes Oilfield Operations, LLC | 2527 |
37 |
| Baker Hughes, a GE Company, LLC | 2056 |
36 |
| Services Petroliers Schlumberger | 6024 |
35 |
| Schlumberger Technology B.v. | 5298 |
30 |
| Saudi Arabian Oil Company | 14235 |
30 |
| Baker Hughes Incorporated | 4934 |
27 |
| Unanimous A.I., Inc. | 53 |
16 |
| Erdos Miller, Inc. | 39 |
16 |
| Halliburton Manufacturing and Services Limited | 58 |
14 |
| Scientific Drilling International, Inc. | 171 |
13 |
| Nabors Drilling Technologies USA, Inc. | 573 |
12 |
| Baker Hughes Holdings LLC | 3023 |
12 |
| Bench Tree Group, LLC | 67 |
11 |
| ExxonMobil Upstream Research Company | 2305 |
11 |
| Weatherford Technology Holdings, LLC | 2155 |
10 |
| Rime Downhole Technologies, LLC | 27 |
10 |
| Other owners | 368 |