- 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 33/12 - PackersPlugs
Patent holdings for IPC class E21B 33/12
Total number of patents in this class: 5441
10-year publication summary
|
538
|
473
|
520
|
462
|
402
|
415
|
367
|
279
|
242
|
137
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20835 |
1154 |
| Schlumberger Technology Corporation | 10662 |
300 |
| Baker Hughes Incorporated | 5277 |
279 |
| Schlumberger Canada Limited | 7273 |
208 |
| Saudi Arabian Oil Company | 12947 |
205 |
| Baker Hughes, a GE Company, LLC | 2114 |
192 |
| Baker Hughes Holdings LLC | 3005 |
181 |
| Services Petroliers Schlumberger | 5772 |
170 |
| Schlumberger Technology B.v. | 5161 |
169 |
| Baker Hughes Oilfield Operations, LLC | 2288 |
155 |
| Weatherford Technology Holdings, LLC | 2015 |
144 |
| Schlumberger Holdings Limited | 2835 |
67 |
| Kureha Corporation | 1022 |
64 |
| ConocoPhillips Company | 1677 |
62 |
| Prad Research and Development Limited | 2693 |
61 |
| Thru Tubing Solutions, Inc. | 376 |
47 |
| ExxonMobil Upstream Research Company | 2407 |
46 |
| Bisn Tec Ltd | 79 |
34 |
| Cameron International Corporation | 1332 |
33 |
| Welltec Manufacturing Center Completions ApS | 91 |
32 |
| Other owners | 1838 |