- 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: 218
10-year publication summary
|
22
|
15
|
10
|
13
|
11
|
17
|
19
|
14
|
9
|
4
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20438 |
38 |
| Schlumberger Technology Corporation | 10263 |
14 |
| Rubberatkins Limited | 32 |
13 |
| Weatherford Technology Holdings, LLC | 2109 |
9 |
| Baker Hughes Oilfield Operations, LLC | 2128 |
9 |
| Baker Hughes Holdings LLC | 3009 |
7 |
| Schlumberger Canada Limited | 7154 |
6 |
| Baker Hughes Incorporated | 5504 |
6 |
| Saudi Arabian Oil Company | 12446 |
6 |
| Schlumberger Technology B.v. | 5075 |
5 |
| Services Petroliers Schlumberger | 5633 |
5 |
| Isolation Equipment Services Inc. | 22 |
3 |
| Oil States Energy Services, L.L.C. | 76 |
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 | 76 |