- 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 33/128 - Packers; Plugs with a member expanded radially by axial pressure
Patent holdings for IPC class E21B 33/128
Total number of patents in this class: 1247
10-year publication summary
|
121
|
144
|
114
|
130
|
147
|
119
|
99
|
107
|
59
|
22
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20165 |
252 |
| Baker Hughes Incorporated | 5689 |
65 |
| Weatherford Technology Holdings, LLC | 2135 |
63 |
| Schlumberger Technology Corporation | 9690 |
58 |
| Baker Hughes Holdings LLC | 3060 |
50 |
| Baker Hughes, a GE Company, LLC | 2171 |
48 |
| Schlumberger Canada Limited | 6913 |
41 |
| The Wellboss Company, LLC | 96 |
35 |
| Saudi Arabian Oil Company | 11322 |
33 |
| Schlumberger Technology B.v. | 4951 |
27 |
| Services Petroliers Schlumberger | 5426 |
27 |
| Welltec Oilfield Solutions AG | 140 |
22 |
| Baker Hughes Oilfield Operations, LLC | 1885 |
20 |
| Exacta-Frac Energy Services, Inc. | 56 |
16 |
| Innovex Downhole Solutions, Inc. | 182 |
16 |
| Interwell Technology AS | 32 |
15 |
| Kureha Corporation | 1026 |
15 |
| Cameron International Corporation | 1305 |
10 |
| Rubberatkins Limited | 32 |
10 |
| Vertice Oil Tools Inc. | 87 |
10 |
| Other owners | 414 |