- 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 33/126 - Packers; Plugs with fluid-pressure-operated elastic cup or skirt
Patent holdings for IPC class E21B 33/126
Total number of patents in this class: 217
10-year publication summary
22
|
15
|
10
|
13
|
11
|
17
|
19
|
14
|
9
|
3
|
2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Halliburton Energy Services, Inc. | 20419 |
38 |
Schlumberger Technology Corporation | 10241 |
14 |
Rubberatkins Limited | 32 |
13 |
Weatherford Technology Holdings, LLC | 2105 |
9 |
Baker Hughes Oilfield Operations, LLC | 2120 |
9 |
Baker Hughes Holdings LLC | 3009 |
7 |
Schlumberger Canada Limited | 7147 |
6 |
Baker Hughes Incorporated | 5508 |
6 |
Saudi Arabian Oil Company | 12423 |
6 |
Schlumberger Technology B.v. | 5068 |
5 |
Services Petroliers Schlumberger | 5626 |
5 |
Isolation Equipment Services Inc. | 22 |
3 |
Oil States Energy Services, L.L.C. | 75 |
3 |
Pilot Drilling Control Limited | 11 |
3 |
Saltel Industries | 64 |
3 |
Weatherford U.K. Limited | 73 |
3 |
Welltec AS | 297 |
3 |
ExxonMobil Upstream Research Company | 2454 |
2 |
HydraWell Inc. | 6 |
2 |
Packers Plus Energy Services Inc. | 123 |
2 |
Other owners | 75 |