- 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: 1247
10-year publication summary
|
67
|
73
|
65
|
68
|
63
|
68
|
76
|
68
|
80
|
51
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20944 |
87 |
| Saudi Arabian Oil Company | 13349 |
85 |
| Bisn Tec Ltd | 80 |
58 |
| Schlumberger Technology Corporation | 10868 |
35 |
| Shell Internationale Research Maatschappij B.V. | 3553 |
34 |
| Baker Hughes Incorporated | 5251 |
30 |
| Shell Oil Company | 2138 |
29 |
| ConocoPhillips Company | 1675 |
26 |
| Ice Thermal Harvesting, LLC | 75 |
23 |
| Harris Corporation | 1417 |
20 |
| Schlumberger Canada Limited | 7363 |
18 |
| Chevron U.S.A. Inc. | 3984 |
17 |
| Aramco Services Company | 4023 |
17 |
| Schlumberger Technology B.v. | 5187 |
16 |
| Services Petroliers Schlumberger | 5827 |
16 |
| ExxonMobil Upstream Research Company | 2395 |
15 |
| Isol8 (Holdings) Limited | 27 |
15 |
| National Oilwell Varco, L.P. | 1686 |
14 |
| Eavor Technologies Inc. | 88 |
13 |
| Statoil Petroleum AS | 524 |
12 |
| Other owners | 667 |