- 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 47/085 - Measuring diameters or related dimensions at the borehole using radiant means, e.g. acoustic, radioactive or electromagnetic
Patent holdings for IPC class E21B 47/085
Total number of patents in this class: 203
10-year publication summary
|
2
|
6
|
19
|
14
|
28
|
26
|
13
|
18
|
16
|
12
|
| 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 |
60 |
| Saudi Arabian Oil Company | 14207 |
18 |
| Schlumberger Technology Corporation | 11798 |
17 |
| Darkvision Technologies Inc. | 91 |
8 |
| Aramco Services Company | 4188 |
7 |
| Schlumberger Canada Limited | 7606 |
5 |
| Services Petroliers Schlumberger | 6024 |
5 |
| Baker Hughes Oilfield Operations, LLC | 2521 |
5 |
| Schlumberger Technology B.v. | 5298 |
4 |
| Prad Research and Development Limited | 2662 |
4 |
| Schlumberger Holdings Limited | 2702 |
3 |
| ConocoPhillips Company | 1708 |
3 |
| GE Energy Oilfield Technology, Inc. | 19 |
3 |
| WWT International Coiled Tubing Services, LLC | 3 |
3 |
| Baker Hughes Incorporated | 4940 |
2 |
| Toshiba Corporation | 12548 |
2 |
| CARBO Ceramics Inc. | 176 |
2 |
| China National Petroleum Corporation | 636 |
2 |
| China Petroleum & Chemical Corporation | 2147 |
2 |
| Pile Dynamics, Inc. | 24 |
2 |
| Other owners | 46 |