- 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: 1243
10-year publication summary
|
67
|
73
|
65
|
68
|
63
|
68
|
76
|
68
|
80
|
54
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21006 |
87 |
| Saudi Arabian Oil Company | 13569 |
87 |
| Bisn Tec Ltd | 80 |
58 |
| Schlumberger Technology Corporation | 10994 |
34 |
| Shell Internationale Research Maatschappij B.V. | 3544 |
32 |
| Baker Hughes Incorporated | 5190 |
29 |
| Shell Oil Company | 2135 |
29 |
| ConocoPhillips Company | 1684 |
26 |
| Ice Thermal Harvesting, LLC | 76 |
23 |
| Harris Corporation | 1386 |
19 |
| Schlumberger Canada Limited | 7410 |
18 |
| Chevron U.S.A. Inc. | 4007 |
17 |
| Aramco Services Company | 4077 |
17 |
| Schlumberger Technology B.v. | 5210 |
16 |
| Services Petroliers Schlumberger | 5866 |
16 |
| ExxonMobil Upstream Research Company | 2382 |
15 |
| Isol8 (Holdings) Limited | 27 |
15 |
| National Oilwell Varco, L.P. | 1695 |
14 |
| Eavor Technologies Inc. | 94 |
14 |
| Statoil Petroleum AS | 511 |
12 |
| Other owners | 665 |