- 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: 822
10-year publication summary
|
75
|
89
|
73
|
74
|
69
|
46
|
42
|
28
|
26
|
6
|
| 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 |
110 |
| Schlumberger Technology Corporation | 11404 |
47 |
| Bisn Tec Ltd | 81 |
35 |
| The Wellboss Company, LLC | 113 |
30 |
| ConocoPhillips Company | 1700 |
29 |
| Saudi Arabian Oil Company | 13921 |
29 |
| Baker Hughes Holdings LLC | 2981 |
24 |
| Baker Hughes Incorporated | 5082 |
15 |
| Weatherford Technology Holdings, LLC | 2043 |
15 |
| Nine Downhole Technologies, LLC | 69 |
13 |
| Baker Hughes Oilfield Operations, LLC | 2423 |
13 |
| Schlumberger Canada Limited | 7550 |
12 |
| ExxonMobil Upstream Research Company | 2347 |
12 |
| Metrol Technology Limited | 85 |
11 |
| Baker Hughes, a GE Company, LLC | 2103 |
11 |
| Schlumberger Technology B.v. | 5263 |
10 |
| Services Petroliers Schlumberger | 5966 |
10 |
| Statoil Petroleum AS | 492 |
9 |
| TCO AS | 74 |
9 |
| Isol8 (Holdings) Limited | 27 |
9 |
| Other owners | 369 |