- 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 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: 121
10-year publication summary
|
8
|
2
|
5
|
8
|
3
|
2
|
4
|
10
|
7
|
10
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20946 |
9 |
| Optionx Holdings Pty Ltd | 11 |
7 |
| M-I L.L.C. | 815 |
6 |
| Saudi Arabian Oil Company | 13372 |
5 |
| ExxonMobil Upstream Research Company | 2392 |
4 |
| US Synthetic Corporation | 617 |
3 |
| Tri-tube Drilling Systems Pty Ltd | 3 |
3 |
| Secure Specialty Chemicals Corp. | 15 |
3 |
| Schlumberger Canada Limited | 7366 |
2 |
| Baker Hughes Incorporated | 5248 |
2 |
| Canadian Energy Services LP | 73 |
2 |
| Drilling Technology Research Institute of Sinopec Shengli Petroleum Engineering Co., Ltd. | 19 |
2 |
| Flotek Chemistry, LLC | 116 |
2 |
| Hercules LLC | 224 |
2 |
| Momentive Performance Materials Inc. | 913 |
2 |
| Sandvik Mining and Construction Oy | 839 |
2 |
| SJM Designs Pty Ltd. | 3 |
2 |
| Deme Offshore BE NV | 45 |
2 |
| Sinopec Petroleum Engineering Technology Service Co., Ltd. | 20 |
2 |
| Sinopec Shengli Petroleum Engineering Co., Ltd | 31 |
2 |
| Other owners | 57 |