- 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 33/10 - Sealing or packing boreholes or wells in the borehole
Patent holdings for IPC class E21B 33/10
Total number of patents in this class: 428
10-year publication summary
|
35
|
20
|
25
|
26
|
20
|
18
|
24
|
22
|
16
|
7
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20964 |
87 |
| Baker Hughes Incorporated | 5246 |
25 |
| Saudi Arabian Oil Company | 13409 |
25 |
| Schlumberger Technology Corporation | 10898 |
17 |
| Schlumberger Canada Limited | 7369 |
14 |
| Weatherford Technology Holdings, LLC | 2028 |
14 |
| ConocoPhillips Company | 1677 |
12 |
| Schlumberger Technology B.v. | 5184 |
11 |
| Services Petroliers Schlumberger | 5830 |
11 |
| Advanced Upstream Ltd. | 40 |
9 |
| Aramco Services Company | 4033 |
8 |
| Baker Hughes Oilfield Operations, LLC | 2331 |
8 |
| Baker Hughes, a GE Company, LLC | 2109 |
7 |
| Schlumberger Holdings Limited | 2800 |
6 |
| Cameron International Corporation | 1342 |
6 |
| Proppant Express Solutions, LLC | 31 |
6 |
| ExxonMobil Upstream Research Company | 2390 |
5 |
| Kureha Corporation | 1038 |
5 |
| Prad Research and Development Limited | 2691 |
5 |
| DYNAenergetics Europe GmbH | 252 |
4 |
| Other owners | 143 |