- 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 33/134 - Bridging plugs
Patent holdings for IPC class E21B 33/134
Total number of patents in this class: 779
10-year publication summary
|
77
|
87
|
92
|
103
|
79
|
85
|
78
|
55
|
39
|
10
|
| 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 |
109 |
| Schlumberger Technology Corporation | 9690 |
43 |
| Bisn Tec Ltd | 74 |
30 |
| ConocoPhillips Company | 1657 |
28 |
| The Wellboss Company, LLC | 96 |
27 |
| Baker Hughes Holdings LLC | 3060 |
24 |
| Saudi Arabian Oil Company | 11322 |
20 |
| Baker Hughes Incorporated | 5689 |
16 |
| Weatherford Technology Holdings, LLC | 2135 |
16 |
| Nine Downhole Technologies, LLC | 72 |
16 |
| Schlumberger Canada Limited | 6913 |
15 |
| Baker Hughes Oilfield Operations, LLC | 1885 |
13 |
| ExxonMobil Upstream Research Company | 2525 |
12 |
| Metrol Technology Limited | 85 |
11 |
| Baker Hughes, a GE Company, LLC | 2171 |
11 |
| Schlumberger Technology B.v. | 4951 |
10 |
| Services Petroliers Schlumberger | 5426 |
10 |
| Statoil Petroleum AS | 555 |
9 |
| TCO AS | 74 |
8 |
| Vertice Oil Tools | 37 |
8 |
| Other owners | 343 |