- 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: 402
10-year publication summary
|
20
|
23
|
25
|
46
|
35
|
64
|
49
|
36
|
29
|
16
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20618 |
85 |
| Saudi Arabian Oil Company | 12609 |
25 |
| Schlumberger Technology Corporation | 10487 |
23 |
| Evolution Engineering Inc. | 301 |
16 |
| Baker Hughes Oilfield Operations, LLC | 2192 |
12 |
| Aramco Services Company | 3852 |
8 |
| Schlumberger Canada Limited | 7134 |
7 |
| Baker Hughes Incorporated | 5325 |
7 |
| Merlin Technology, Inc. | 164 |
7 |
| Baker Hughes Holdings LLC | 3023 |
7 |
| Rig Technologies International Pty Ltd | 15 |
7 |
| Schlumberger Technology B.v. | 5113 |
6 |
| China Petroleum & Chemical Corporation | 1821 |
6 |
| Institute of Geology and Geophysics, Chinese Academy of Sciences | 319 |
6 |
| Sanvean Technologies LLC | 38 |
6 |
| Services Petroliers Schlumberger | 5698 |
6 |
| Baker Hughes, a GE Company, LLC | 2115 |
6 |
| ExxonMobil Upstream Research Company | 2415 |
5 |
| National Oilwell Varco, L.P. | 1620 |
4 |
| Reflex Instruments Asia Pacific Pty Ltd | 85 |
4 |
| Other owners | 149 |