- 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 33/134 - Bridging plugs
Patent holdings for IPC class E21B 33/134
Total number of patents in this class: 803
10-year publication summary
|
87
|
92
|
103
|
80
|
85
|
78
|
55
|
48
|
25
|
14
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20879 |
108 |
| Schlumberger Technology Corporation | 10705 |
44 |
| Bisn Tec Ltd | 79 |
35 |
| ConocoPhillips Company | 1673 |
29 |
| The Wellboss Company, LLC | 102 |
27 |
| Saudi Arabian Oil Company | 13091 |
25 |
| Baker Hughes Holdings LLC | 3007 |
24 |
| Weatherford Technology Holdings, LLC | 2022 |
16 |
| Baker Hughes Incorporated | 5252 |
14 |
| Nine Downhole Technologies, LLC | 71 |
13 |
| Baker Hughes Oilfield Operations, LLC | 2297 |
13 |
| Schlumberger Canada Limited | 7293 |
12 |
| ExxonMobil Upstream Research Company | 2403 |
12 |
| Metrol Technology Limited | 84 |
11 |
| Baker Hughes, a GE Company, LLC | 2112 |
11 |
| Schlumberger Technology B.v. | 5166 |
10 |
| Services Petroliers Schlumberger | 5784 |
10 |
| Statoil Petroleum AS | 517 |
9 |
| Isol8 (Holdings) Limited | 25 |
9 |
| Archer Oil Tools AS | 16 |
8 |
| Other owners | 363 |