- All sections
- E - Fixed constructions
- E21B - Earth or rock drilling; obtaining 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: 1184
10-year publication summary
|
147
|
82
|
79
|
76
|
79
|
74
|
75
|
82
|
72
|
31
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20165 |
83 |
| Saudi Arabian Oil Company | 11322 |
79 |
| Bisn Tec Ltd | 74 |
56 |
| Shell Internationale Research Maatschappij B.V. | 3792 |
40 |
| Baker Hughes Incorporated | 5689 |
32 |
| Schlumberger Technology Corporation | 9690 |
29 |
| Shell Oil Company | 2196 |
29 |
| Harris Corporation | 1591 |
27 |
| ConocoPhillips Company | 1657 |
25 |
| Chevron U.S.A. Inc. | 3774 |
16 |
| Aramco Services Company | 3504 |
16 |
| ExxonMobil Upstream Research Company | 2525 |
16 |
| Ice Thermal Harvesting, LLC | 68 |
16 |
| Schlumberger Canada Limited | 6913 |
15 |
| Schlumberger Technology B.v. | 4951 |
13 |
| Services Petroliers Schlumberger | 5426 |
13 |
| Statoil Petroleum AS | 555 |
12 |
| Acergy France SAS | 124 |
11 |
| Baker Hughes Oilfield Operations, LLC | 1885 |
11 |
| Baker Hughes Holdings LLC | 3060 |
11 |
| Other owners | 634 |