- 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: 5374
10-year publication summary
|
538
|
473
|
520
|
462
|
402
|
415
|
366
|
275
|
231
|
94
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20635 |
1135 |
| Schlumberger Technology Corporation | 10512 |
298 |
| Baker Hughes Incorporated | 5316 |
281 |
| Schlumberger Canada Limited | 7146 |
203 |
| Saudi Arabian Oil Company | 12683 |
203 |
| Baker Hughes, a GE Company, LLC | 2115 |
192 |
| Baker Hughes Holdings LLC | 3020 |
181 |
| Services Petroliers Schlumberger | 5705 |
169 |
| Schlumberger Technology B.v. | 5116 |
168 |
| Baker Hughes Oilfield Operations, LLC | 2211 |
150 |
| Weatherford Technology Holdings, LLC | 2008 |
144 |
| Schlumberger Holdings Limited | 2852 |
67 |
| Kureha Corporation | 1017 |
62 |
| ConocoPhillips Company | 1667 |
61 |
| Prad Research and Development Limited | 2696 |
61 |
| ExxonMobil Upstream Research Company | 2414 |
46 |
| Thru Tubing Solutions, Inc. | 368 |
45 |
| Bisn Tec Ltd | 78 |
33 |
| Cameron International Corporation | 1325 |
33 |
| Welltec Manufacturing Center Completions ApS | 91 |
32 |
| Other owners | 1810 |