- 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: 2418
10-year publication summary
|
222
|
175
|
182
|
196
|
201
|
198
|
161
|
141
|
94
|
71
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20944 |
323 |
| Saudi Arabian Oil Company | 13349 |
132 |
| Schlumberger Technology Corporation | 10868 |
121 |
| Weatherford Technology Holdings, LLC | 2029 |
57 |
| Schlumberger Canada Limited | 7363 |
44 |
| Schlumberger Technology B.v. | 5187 |
42 |
| Services Petroliers Schlumberger | 5827 |
42 |
| Baker Hughes Incorporated | 5251 |
41 |
| Baker Hughes Oilfield Operations, LLC | 2320 |
39 |
| Innovex Downhole Solutions, LLC | 146 |
34 |
| Baker Hughes, a GE Company, LLC | 2111 |
33 |
| Petromac IP Limited | 39 |
32 |
| Baker Hughes Holdings LLC | 3001 |
31 |
| National Oilwell Varco, L.P. | 1686 |
30 |
| Aramco Services Company | 4023 |
28 |
| Evolution Engineering Inc. | 301 |
24 |
| Frank's International, LLC | 239 |
24 |
| Schlumberger Holdings Limited | 2808 |
20 |
| Prad Research and Development Limited | 2692 |
18 |
| Chevron U.S.A. Inc. | 3984 |
16 |
| Other owners | 1287 |