- All sections
- E - Fixed constructions
- E21B - Earth or rock drilling; obtaining 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: 7440
10-year publication summary
|
712
|
882
|
899
|
657
|
451
|
361
|
259
|
159
|
116
|
40
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20165 |
1411 |
| Schlumberger Technology Corporation | 9690 |
734 |
| Schlumberger Canada Limited | 6913 |
527 |
| Services Petroliers Schlumberger | 5426 |
462 |
| Schlumberger Technology B.v. | 4951 |
395 |
| Baker Hughes Incorporated | 5689 |
366 |
| Saudi Arabian Oil Company | 11322 |
247 |
| Schlumberger Holdings Limited | 2947 |
238 |
| Prad Research and Development Limited | 2696 |
234 |
| Landmark Graphics Corporation | 1526 |
173 |
| Baker Hughes, a GE Company, LLC | 2171 |
146 |
| Weatherford Technology Holdings, LLC | 2135 |
93 |
| Baker Hughes Holdings LLC | 3060 |
87 |
| Aramco Services Company | 3504 |
66 |
| Geoquest Systems B.V. | 584 |
65 |
| Chevron U.S.A. Inc. | 3774 |
63 |
| ExxonMobil Upstream Research Company | 2525 |
60 |
| ConocoPhillips Company | 1657 |
50 |
| Baker Hughes Oilfield Operations, LLC | 1885 |
43 |
| Shell Internationale Research Maatschappij B.V. | 3792 |
39 |
| Other owners | 1941 |