- 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 47/26 - 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: 709
10-year publication summary
|
15
|
6
|
14
|
27
|
35
|
93
|
79
|
43
|
20
|
25
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20977 |
127 |
| Schlumberger Technology Corporation | 10914 |
76 |
| Schlumberger Canada Limited | 7373 |
76 |
| Services Petroliers Schlumberger | 5835 |
64 |
| Schlumberger Technology B.v. | 5189 |
41 |
| Landmark Graphics Corporation | 1523 |
39 |
| Saudi Arabian Oil Company | 13428 |
39 |
| Geoquest Systems B.V. | 776 |
21 |
| Baker Hughes Incorporated | 5243 |
17 |
| Prad Research and Development Limited | 2690 |
15 |
| Schlumberger Holdings Limited | 2800 |
14 |
| Baker Hughes Oilfield Operations, LLC | 2334 |
13 |
| Sanvean Technologies LLC | 38 |
10 |
| Aramco Services Company | 4039 |
8 |
| Weatherford Technology Holdings, LLC | 2033 |
7 |
| ConocoPhillips Company | 1683 |
6 |
| China Petroleum & Chemical Corporation | 1913 |
5 |
| Evolution Engineering Inc. | 301 |
5 |
| Reflex Instruments Asia Pacific Pty Ltd | 86 |
5 |
| Petrolink International Ltd. | 22 |
5 |
| Other owners | 116 |