- 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: 2434
10-year publication summary
|
193
|
201
|
224
|
229
|
216
|
181
|
159
|
102
|
95
|
30
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21230 |
329 |
| Saudi Arabian Oil Company | 13948 |
136 |
| Schlumberger Technology Corporation | 11522 |
122 |
| Weatherford Technology Holdings, LLC | 2069 |
56 |
| Schlumberger Canada Limited | 7564 |
44 |
| Schlumberger Technology B.v. | 5269 |
40 |
| Services Petroliers Schlumberger | 5979 |
40 |
| Baker Hughes Incorporated | 5038 |
39 |
| Baker Hughes Oilfield Operations, LLC | 2464 |
38 |
| Petromac IP Limited | 40 |
33 |
| Baker Hughes, a GE Company, LLC | 2093 |
33 |
| Innovex Downhole Solutions, LLC | 145 |
33 |
| Baker Hughes Holdings LLC | 2991 |
31 |
| National Oilwell Varco, L.P. | 1690 |
30 |
| Aramco Services Company | 4162 |
28 |
| Evolution Engineering Inc. | 300 |
24 |
| Frank's International, LLC | 237 |
24 |
| Schlumberger Holdings Limited | 2733 |
18 |
| Prad Research and Development Limited | 2679 |
18 |
| Frank's International, Inc. | 61 |
16 |
| Other owners | 1302 |