- 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 36/02 - Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones using burners
Patent holdings for IPC class E21B 36/02
Total number of patents in this class: 90
10-year publication summary
|
10
|
4
|
6
|
1
|
0
|
0
|
4
|
1
|
5
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| World Energy Systems Incorporated | 26 |
11 |
| Halliburton Energy Services, Inc. | 20835 |
6 |
| Precision Combustion, Inc. | 104 |
6 |
| Shell Internationale Research Maatschappij B.V. | 3551 |
5 |
| Shell Oil Company | 2141 |
5 |
| General Energy Recovery Inc. | 19 |
5 |
| Northrop Grumman Systems Corporation | 2951 |
4 |
| Alliant Techsystems Inc. | 45 |
4 |
| XDI Holdings, LLC | 38 |
4 |
| 8 Rivers Capital, LLC | 252 |
3 |
| Adler Hot Oil Service, LLC | 6 |
3 |
| ConocoPhillips Company | 1677 |
3 |
| Palmer Labs, LLC | 30 |
3 |
| Aptiv Technologies AG | 2341 |
3 |
| Saudi Arabian Oil Company | 12947 |
2 |
| Wintershall Holding GmbH | 67 |
2 |
| QSI Technologies Inc. | 3 |
2 |
| Arcbyt, Inc. | 14 |
2 |
| Schlumberger Technology Corporation | 10662 |
1 |
| American Shale Oil, LLC | 19 |
1 |
| Other owners | 15 |