- 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: 2429
10-year publication summary
|
175
|
182
|
196
|
201
|
198
|
161
|
141
|
95
|
88
|
17
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21154 |
325 |
| Saudi Arabian Oil Company | 13937 |
136 |
| Schlumberger Technology Corporation | 11436 |
122 |
| Weatherford Technology Holdings, LLC | 2034 |
56 |
| Schlumberger Canada Limited | 7552 |
44 |
| Schlumberger Technology B.v. | 5267 |
40 |
| Services Petroliers Schlumberger | 5971 |
40 |
| Baker Hughes Incorporated | 5069 |
39 |
| Baker Hughes Oilfield Operations, LLC | 2429 |
38 |
| Innovex Downhole Solutions, LLC | 146 |
34 |
| Baker Hughes, a GE Company, LLC | 2101 |
33 |
| Petromac IP Limited | 39 |
32 |
| Baker Hughes Holdings LLC | 2982 |
31 |
| National Oilwell Varco, L.P. | 1701 |
30 |
| Aramco Services Company | 4168 |
28 |
| Evolution Engineering Inc. | 300 |
24 |
| Frank's International, LLC | 238 |
24 |
| Schlumberger Holdings Limited | 2744 |
18 |
| Prad Research and Development Limited | 2680 |
18 |
| Frank's International, Inc. | 61 |
16 |
| Other owners | 1301 |