- All sections
- E - Fixed constructions
- E21B - Earth or rock drilling; obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B 33/12 - Packers; Plugs
Patent holdings for IPC class E21B 33/12
Total number of patents in this class: 5160
10-year publication summary
416
|
538
|
473
|
520
|
461
|
402
|
414
|
360
|
252
|
80
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Halliburton Energy Services, Inc. | 20165 |
1084 |
Baker Hughes Incorporated | 5689 |
291 |
Schlumberger Technology Corporation | 9690 |
266 |
Baker Hughes, a GE Company, LLC | 2171 |
193 |
Schlumberger Canada Limited | 6913 |
192 |
Saudi Arabian Oil Company | 11322 |
188 |
Baker Hughes Holdings LLC | 3060 |
186 |
Services Petroliers Schlumberger | 5426 |
156 |
Schlumberger Technology B.v. | 4951 |
155 |
Weatherford Technology Holdings, LLC | 2135 |
151 |
Baker Hughes Oilfield Operations, LLC | 1885 |
117 |
Schlumberger Holdings Limited | 2947 |
69 |
Kureha Corporation | 1026 |
61 |
Prad Research and Development Limited | 2696 |
61 |
ConocoPhillips Company | 1657 |
57 |
ExxonMobil Upstream Research Company | 2525 |
46 |
Thru Tubing Solutions, Inc. | 361 |
42 |
Welltec Oilfield Solutions AG | 140 |
42 |
Nine Downhole Technologies, LLC | 72 |
33 |
Cameron International Corporation | 1305 |
31 |
Other owners | 1739 |