- 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 47/26 - Storing data down-hole, e.g. in a memory or on a record carrier
Patent holdings for IPC class E21B 47/26
Total number of patents in this class: 661
10-year publication summary
|
33
|
26
|
11
|
20
|
30
|
39
|
103
|
92
|
41
|
5
|
| 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 |
123 |
| Schlumberger Canada Limited | 6913 |
73 |
| Schlumberger Technology Corporation | 9690 |
66 |
| Services Petroliers Schlumberger | 5426 |
60 |
| Schlumberger Technology B.v. | 4951 |
37 |
| Landmark Graphics Corporation | 1526 |
37 |
| Saudi Arabian Oil Company | 11322 |
29 |
| Geoquest Systems B.V. | 584 |
21 |
| Baker Hughes Incorporated | 5689 |
17 |
| Prad Research and Development Limited | 2696 |
15 |
| Schlumberger Holdings Limited | 2947 |
14 |
| Baker Hughes Oilfield Operations, LLC | 1885 |
13 |
| Sanvean Technologies LLC | 39 |
11 |
| Weatherford Technology Holdings, LLC | 2135 |
7 |
| Aramco Services Company | 3504 |
6 |
| Evolution Engineering Inc. | 313 |
5 |
| Petrolink International Ltd. | 22 |
5 |
| ExxonMobil Upstream Research Company | 2525 |
4 |
| Reflex Instruments Asia Pacific Pty Ltd | 83 |
4 |
| China Petroleum & Chemical Corporation | 1623 |
3 |
| Other owners | 111 |