- 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: 1311
10-year publication summary
|
144
|
114
|
130
|
147
|
120
|
99
|
111
|
65
|
60
|
28
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20649 |
276 |
| Baker Hughes Incorporated | 5306 |
65 |
| Schlumberger Technology Corporation | 10530 |
64 |
| Weatherford Technology Holdings, LLC | 2011 |
60 |
| Baker Hughes Holdings LLC | 3020 |
51 |
| Baker Hughes, a GE Company, LLC | 2115 |
47 |
| Schlumberger Canada Limited | 7163 |
39 |
| The Wellboss Company, LLC | 103 |
37 |
| Saudi Arabian Oil Company | 12711 |
33 |
| Schlumberger Technology B.v. | 5122 |
29 |
| Services Petroliers Schlumberger | 5715 |
29 |
| Baker Hughes Oilfield Operations, LLC | 2218 |
26 |
| Welltec Manufacturing Center Completions ApS | 91 |
19 |
| Interwell Technology AS | 32 |
15 |
| Kureha Corporation | 1018 |
15 |
| Exacta-Frac Energy Services, Inc. | 55 |
15 |
| Innovex Downhole Solutions, LLC | 146 |
14 |
| Rubberatkins Limited | 32 |
11 |
| Vertice Oil Tools Inc. | 89 |
11 |
| Cameron International Corporation | 1324 |
10 |
| Other owners | 445 |