- 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 36/00 - Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
Patent holdings for IPC class E21B 36/00
Total number of patents in this class: 1244
10-year publication summary
|
79
|
76
|
79
|
74
|
75
|
81
|
75
|
83
|
64
|
20
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21257 |
91 |
| Saudi Arabian Oil Company | 13956 |
89 |
| Bisn Tec Ltd | 82 |
60 |
| Schlumberger Technology Corporation | 11584 |
42 |
| Shell Internationale Research Maatschappij B.V. | 3437 |
30 |
| Baker Hughes Incorporated | 5018 |
28 |
| Shell Oil Company | 2083 |
27 |
| ConocoPhillips Company | 1697 |
25 |
| Ice Thermal Harvesting, LLC | 77 |
23 |
| Schlumberger Canada Limited | 7588 |
19 |
| Harris Corporation | 1331 |
19 |
| Schlumberger Technology B.v. | 5282 |
17 |
| Aramco Services Company | 4162 |
17 |
| Services Petroliers Schlumberger | 5996 |
17 |
| Chevron U.S.A. Inc. | 4117 |
15 |
| ExxonMobil Upstream Research Company | 2331 |
15 |
| Eavor Technologies Inc. | 109 |
15 |
| Isol8 (Holdings) Limited | 28 |
15 |
| National Oilwell Varco, L.P. | 1690 |
14 |
| Baker Hughes Oilfield Operations, LLC | 2480 |
12 |
| Other owners | 654 |