- 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 47/017 - Protecting measuring instruments
Patent holdings for IPC class E21B 47/017
Total number of patents in this class: 445
10-year publication summary
|
16
|
20
|
44
|
33
|
58
|
42
|
34
|
31
|
50
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21122 |
91 |
| Schlumberger Technology Corporation | 11129 |
31 |
| Saudi Arabian Oil Company | 13708 |
26 |
| Evolution Engineering Inc. | 300 |
16 |
| Baker Hughes Oilfield Operations, LLC | 2403 |
14 |
| Aramco Services Company | 4125 |
9 |
| Schlumberger Canada Limited | 7460 |
8 |
| Baker Hughes Incorporated | 5162 |
7 |
| Merlin Technology, Inc. | 164 |
7 |
| Services Petroliers Schlumberger | 5901 |
7 |
| Baker Hughes Holdings LLC | 2997 |
7 |
| Schlumberger Technology B.v. | 5228 |
6 |
| China Petroleum & Chemical Corporation | 1968 |
6 |
| Institute of Geology and Geophysics, Chinese Academy of Sciences | 335 |
6 |
| Sanvean Technologies LLC | 38 |
6 |
| Baker Hughes, a GE Company, LLC | 2101 |
6 |
| Rig Technologies International Pty Ltd | 13 |
6 |
| Hephae Energy Technology | 6 |
6 |
| ExxonMobil Upstream Research Company | 2371 |
5 |
| National Oilwell Varco, L.P. | 1701 |
4 |
| Other owners | 171 |