- 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 47/00 - Survey of boreholes or wells
Patent holdings for IPC class E21B 47/00
Total number of patents in this class: 7578
10-year publication summary
|
900
|
657
|
450
|
361
|
264
|
161
|
133
|
131
|
142
|
82
|
| 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 |
1408 |
| Schlumberger Technology Corporation | 11798 |
759 |
| Schlumberger Canada Limited | 7606 |
538 |
| Services Petroliers Schlumberger | 6024 |
475 |
| Schlumberger Technology B.v. | 5298 |
393 |
| Baker Hughes Incorporated | 4940 |
347 |
| Saudi Arabian Oil Company | 14207 |
269 |
| Prad Research and Development Limited | 2662 |
233 |
| Schlumberger Holdings Limited | 2702 |
225 |
| Landmark Graphics Corporation | 1508 |
171 |
| Baker Hughes, a GE Company, LLC | 2057 |
145 |
| Weatherford Technology Holdings, LLC | 2154 |
88 |
| Geoquest Systems B.V. | 871 |
81 |
| Baker Hughes Holdings LLC | 3023 |
81 |
| Aramco Services Company | 4188 |
75 |
| Chevron U.S.A. Inc. | 4134 |
67 |
| ConocoPhillips Company | 1708 |
59 |
| ExxonMobil Upstream Research Company | 2306 |
53 |
| Baker Hughes Oilfield Operations, LLC | 2521 |
50 |
| Shell Internationale Research Maatschappij B.V. | 3409 |
36 |
| Other owners | 2025 |