- 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: 1242
10-year publication summary
|
67
|
73
|
65
|
68
|
63
|
68
|
76
|
68
|
80
|
58
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21090 |
88 |
| Saudi Arabian Oil Company | 13686 |
88 |
| Bisn Tec Ltd | 81 |
59 |
| Schlumberger Technology Corporation | 11075 |
36 |
| Shell Internationale Research Maatschappij B.V. | 3542 |
32 |
| Baker Hughes Incorporated | 5172 |
29 |
| Shell Oil Company | 2133 |
29 |
| ConocoPhillips Company | 1689 |
26 |
| Ice Thermal Harvesting, LLC | 76 |
23 |
| Harris Corporation | 1377 |
19 |
| Schlumberger Canada Limited | 7440 |
18 |
| Aramco Services Company | 4099 |
17 |
| Schlumberger Technology B.v. | 5224 |
16 |
| Chevron U.S.A. Inc. | 4020 |
16 |
| Services Petroliers Schlumberger | 5885 |
16 |
| ExxonMobil Upstream Research Company | 2378 |
15 |
| Isol8 (Holdings) Limited | 27 |
15 |
| National Oilwell Varco, L.P. | 1701 |
14 |
| Eavor Technologies Inc. | 94 |
14 |
| Statoil Petroleum AS | 510 |
12 |
| Other owners | 660 |