- 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 37/00 - Methods or apparatus for cleaning boreholes or wells
Patent holdings for IPC class E21B 37/00
Total number of patents in this class: 1096
10-year publication summary
|
85
|
103
|
89
|
76
|
73
|
86
|
69
|
51
|
44
|
52
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21015 |
142 |
| Saudi Arabian Oil Company | 13600 |
107 |
| Schlumberger Technology Corporation | 11013 |
47 |
| Baker Hughes Incorporated | 5183 |
39 |
| ConocoPhillips Company | 1682 |
28 |
| Baker Hughes Holdings LLC | 3005 |
28 |
| Schlumberger Canada Limited | 7416 |
24 |
| Services Petroliers Schlumberger | 5872 |
24 |
| Schlumberger Technology B.v. | 5215 |
23 |
| Baker Hughes Oilfield Operations, LLC | 2378 |
22 |
| Baker Hughes, a GE Company, LLC | 2107 |
22 |
| Aramco Services Company | 4083 |
18 |
| Hydra Systems AS | 36 |
16 |
| M-I L.L.C. | 806 |
15 |
| Odfjell Well Services Norway AS | 19 |
15 |
| Altus Intervention (technologies) AS | 69 |
15 |
| Weatherford Technology Holdings, LLC | 2027 |
14 |
| Petroleo Brasileiro S.A. - Petrobras | 876 |
14 |
| Schlumberger Holdings Limited | 2793 |
13 |
| Prad Research and Development Limited | 2688 |
11 |
| Other owners | 459 |