- 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 17/10 - Wear protectorsCentralising devices
Patent holdings for IPC class E21B 17/10
Total number of patents in this class: 2449
10-year publication summary
|
193
|
201
|
224
|
229
|
216
|
181
|
159
|
103
|
100
|
53
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21292 |
331 |
| Saudi Arabian Oil Company | 14369 |
136 |
| Schlumberger Technology Corporation | 11940 |
127 |
| Weatherford Technology Holdings, LLC | 2166 |
63 |
| Schlumberger Canada Limited | 7610 |
45 |
| Schlumberger Technology B.v. | 5287 |
41 |
| Services Petroliers Schlumberger | 6022 |
41 |
| Baker Hughes Incorporated | 4883 |
38 |
| Baker Hughes Oilfield Operations, LLC | 2555 |
38 |
| Petromac IP Limited | 41 |
33 |
| Baker Hughes, a GE Company, LLC | 2022 |
33 |
| Innovex Downhole Solutions, LLC | 143 |
33 |
| Baker Hughes Holdings LLC | 3010 |
31 |
| National Oilwell Varco, L.P. | 1700 |
30 |
| Aramco Services Company | 4190 |
28 |
| Evolution Engineering Inc. | 302 |
24 |
| Frank's International, LLC | 239 |
24 |
| Schlumberger Holdings Limited | 2660 |
18 |
| Prad Research and Development Limited | 2642 |
18 |
| Postle Industries, Inc. | 63 |
16 |
| Other owners | 1301 |