- 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: 5551
10-year publication summary
|
439
|
400
|
434
|
380
|
340
|
354
|
327
|
251
|
238
|
233
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21103 |
1189 |
| Schlumberger Technology Corporation | 11089 |
308 |
| Baker Hughes Incorporated | 5168 |
277 |
| Schlumberger Canada Limited | 7446 |
216 |
| Saudi Arabian Oil Company | 13716 |
215 |
| Baker Hughes, a GE Company, LLC | 2103 |
192 |
| Baker Hughes Holdings LLC | 3000 |
181 |
| Services Petroliers Schlumberger | 5888 |
171 |
| Schlumberger Technology B.v. | 5224 |
170 |
| Baker Hughes Oilfield Operations, LLC | 2395 |
162 |
| Weatherford Technology Holdings, LLC | 2036 |
145 |
| Kureha Corporation | 1040 |
65 |
| Schlumberger Holdings Limited | 2780 |
64 |
| ConocoPhillips Company | 1690 |
61 |
| Prad Research and Development Limited | 2687 |
61 |
| Thru Tubing Solutions, Inc. | 382 |
50 |
| ExxonMobil Upstream Research Company | 2377 |
46 |
| Cameron International Corporation | 1355 |
37 |
| Bisn Tec Ltd | 81 |
35 |
| The Wellboss Company, LLC | 108 |
33 |
| Other owners | 1873 |