- 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 47/09 - Locating or determining the position of objects in boreholes or wellsIdentifying the free or blocked portions of pipes
Patent holdings for IPC class E21B 47/09
Total number of patents in this class: 1837
10-year publication summary
|
164
|
197
|
153
|
110
|
113
|
86
|
62
|
66
|
71
|
35
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21292 |
440 |
| Schlumberger Technology Corporation | 11940 |
137 |
| Saudi Arabian Oil Company | 14369 |
108 |
| Baker Hughes Incorporated | 4883 |
72 |
| Schlumberger Canada Limited | 7610 |
65 |
| Services Petroliers Schlumberger | 6022 |
56 |
| Schlumberger Technology B.v. | 5287 |
51 |
| Motive Drilling Technologies, Inc. | 104 |
30 |
| Baker Hughes, a GE Company, LLC | 2022 |
30 |
| Schlumberger Holdings Limited | 2660 |
29 |
| Prad Research and Development Limited | 2642 |
28 |
| Weatherford Technology Holdings, LLC | 2166 |
27 |
| Landmark Graphics Corporation | 1492 |
22 |
| Baker Hughes Oilfield Operations, LLC | 2555 |
22 |
| ConocoPhillips Company | 1714 |
20 |
| ExxonMobil Upstream Research Company | 2285 |
20 |
| Aramco Services Company | 4190 |
18 |
| Baker Hughes Holdings LLC | 3010 |
18 |
| CARBO Ceramics Inc. | 175 |
13 |
| Intelligent Wellhead Systems Inc. | 78 |
13 |
| Other owners | 618 |