- 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 33/128 - PackersPlugs with a member expanded radially by axial pressure
Patent holdings for IPC class E21B 33/128
Total number of patents in this class: 1384
10-year publication summary
|
97
|
118
|
128
|
105
|
87
|
92
|
58
|
61
|
87
|
13
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21153 |
310 |
| Schlumberger Technology Corporation | 11404 |
68 |
| Weatherford Technology Holdings, LLC | 2043 |
61 |
| Baker Hughes Incorporated | 5082 |
60 |
| Baker Hughes Holdings LLC | 2981 |
51 |
| Baker Hughes, a GE Company, LLC | 2103 |
47 |
| The Wellboss Company, LLC | 113 |
41 |
| Schlumberger Canada Limited | 7550 |
40 |
| Saudi Arabian Oil Company | 13921 |
33 |
| Schlumberger Technology B.v. | 5263 |
30 |
| Services Petroliers Schlumberger | 5966 |
30 |
| Baker Hughes Oilfield Operations, LLC | 2423 |
28 |
| Welltec Manufacturing Center Completions ApS | 94 |
19 |
| Interwell Technology AS | 32 |
15 |
| Kureha Corporation | 1047 |
15 |
| Exacta-Frac Energy Services, Inc. | 55 |
15 |
| Vertice Oil Tools Inc. | 95 |
14 |
| Innovex Downhole Solutions, LLC | 146 |
14 |
| Rubberatkins Limited | 30 |
11 |
| Cameron International Corporation | 1361 |
10 |
| Other owners | 472 |