- 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 47/092 - Locating or determining the position of objects in boreholes or wellsIdentifying the free or blocked portions of pipes by detecting magnetic anomalies
Patent holdings for IPC class E21B 47/092
Total number of patents in this class: 272
10-year publication summary
|
6
|
9
|
19
|
19
|
36
|
41
|
31
|
22
|
17
|
5
|
| 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 |
83 |
| Schlumberger Technology Corporation | 10662 |
15 |
| Saudi Arabian Oil Company | 12947 |
12 |
| Intelligent Wellhead Systems Inc. | 79 |
10 |
| Advanced Upstream Ltd. | 40 |
10 |
| The Charles Machine Works, Inc. | 406 |
8 |
| Hunting Titan, Inc. | 245 |
8 |
| Baker Hughes Incorporated | 5277 |
7 |
| Baker Hughes Oilfield Operations, LLC | 2288 |
7 |
| CARBO Ceramics Inc. | 237 |
6 |
| Schlumberger Canada Limited | 7273 |
5 |
| Schlumberger Technology B.v. | 5161 |
5 |
| Weatherford Technology Holdings, LLC | 2015 |
5 |
| Services Petroliers Schlumberger | 5772 |
5 |
| Schlumberger Holdings Limited | 2835 |
4 |
| Aramco Services Company | 3929 |
4 |
| Prad Research and Development Limited | 2693 |
4 |
| Scientific Drilling International, Inc. | 168 |
4 |
| Cameron International Corporation | 1332 |
3 |
| Magnetic Variation Services, LLC | 37 |
3 |
| Other owners | 64 |