- 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 21/14 - Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using liquids and gases, e.g. foams
Patent holdings for IPC class E21B 21/14
Total number of patents in this class: 110
10-year publication summary
|
16
|
20
|
7
|
6
|
10
|
5
|
3
|
4
|
10
|
1
|
| 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 |
9 |
| M-I L.L.C. | 893 |
7 |
| Optionx Holdings Pty Ltd | 8 |
7 |
| ExxonMobil Upstream Research Company | 2525 |
5 |
| Secure Energy (drilling Services) Inc. | 16 |
4 |
| US Synthetic Corporation | 601 |
3 |
| Schlumberger Canada Limited | 6913 |
2 |
| Baker Hughes Incorporated | 5689 |
2 |
| Chevron Oronite Company LLC | 551 |
2 |
| Canadian Energy Services LP | 67 |
2 |
| Drilling Technology Research Institute of Sinopec Shengli Petroleum Engineering Co., Ltd. | 12 |
2 |
| Flotek Chemistry, LLC | 120 |
2 |
| Hercules LLC | 231 |
2 |
| Momentive Performance Materials Inc. | 861 |
2 |
| Saudi Arabian Oil Company | 11322 |
2 |
| SJM Designs Pty Ltd. | 3 |
2 |
| Deme Offshore BE NV | 44 |
2 |
| Sinopec Petroleum Engineering Technology Service Co., Ltd. | 19 |
2 |
| Sinopec Shengli Petroleum Engineering Co., Ltd | 20 |
2 |
| RheoVest, LLC | 8 |
2 |
| Other owners | 47 |