- 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 33/129 - PackersPlugs with mechanical slips for hooking into the casing
Patent holdings for IPC class E21B 33/129
Total number of patents in this class: 1126
10-year publication summary
|
112
|
94
|
114
|
112
|
100
|
105
|
100
|
80
|
80
|
47
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20788 |
182 |
| Weatherford Technology Holdings, LLC | 2016 |
60 |
| Schlumberger Technology Corporation | 10652 |
56 |
| Baker Hughes Oilfield Operations, LLC | 2283 |
53 |
| The Wellboss Company, LLC | 102 |
51 |
| Baker Hughes, a GE Company, LLC | 2114 |
36 |
| Baker Hughes Holdings LLC | 3006 |
33 |
| Nine Downhole Technologies, LLC | 71 |
32 |
| Schlumberger Canada Limited | 7266 |
31 |
| Baker Hughes Incorporated | 5279 |
31 |
| Schlumberger Technology B.v. | 5160 |
26 |
| Services Petroliers Schlumberger | 5771 |
26 |
| CNPC USA Corp. | 155 |
23 |
| Saudi Arabian Oil Company | 12911 |
23 |
| Innovex Downhole Solutions, LLC | 146 |
21 |
| Vertice Oil Tools Inc. | 91 |
16 |
| China National Petroleum Corporation | 430 |
13 |
| Beijing Huamei, Inc. | 104 |
12 |
| G & H Diversified Manufacturing, LP, Edward Cannoy Kash, U.S. Citizen; Merry Janan Kash, U.S. Citizen | 69 |
11 |
| Exacta-Frac Energy Services, Inc. | 55 |
11 |
| Other owners | 379 |