- 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 33/1295 - PackersPlugs with mechanical slips for hooking into the casing actuated by fluid pressure
Patent holdings for IPC class E21B 33/1295
Total number of patents in this class: 151
10-year publication summary
|
6
|
12
|
15
|
8
|
11
|
9
|
18
|
8
|
7
|
9
|
| 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 |
34 |
| Schlumberger Technology Corporation | 10662 |
10 |
| Baker Hughes Incorporated | 5277 |
9 |
| Baker Hughes Oilfield Operations, LLC | 2288 |
6 |
| Schlumberger Canada Limited | 7273 |
5 |
| Saudi Arabian Oil Company | 12947 |
5 |
| Baker Hughes, a GE Company, LLC | 2114 |
5 |
| Baker Hughes Holdings LLC | 3005 |
5 |
| Schlumberger Technology B.v. | 5161 |
4 |
| Weatherford Technology Holdings, LLC | 2015 |
4 |
| China National Petroleum Corporation | 446 |
4 |
| Services Petroliers Schlumberger | 5772 |
4 |
| Alaskan Energy Resources, Inc. | 9 |
2 |
| Aramco Services Company | 3929 |
2 |
| CNPC USA Corp. | 155 |
2 |
| Comitt Well Solutions US Holding Inc. | 11 |
2 |
| ExxonMobil Upstream Research Company | 2407 |
2 |
| Interwell Norway AS | 61 |
2 |
| Kobold Services Inc. | 5 |
2 |
| Well Technology AS | 8 |
2 |
| Other owners | 40 |