- 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: 1078
10-year publication summary
|
101
|
115
|
101
|
90
|
82
|
93
|
75
|
53
|
44
|
32
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20871 |
141 |
| Saudi Arabian Oil Company | 13044 |
104 |
| Schlumberger Technology Corporation | 10691 |
44 |
| Baker Hughes Incorporated | 5268 |
39 |
| Baker Hughes Holdings LLC | 3003 |
29 |
| ConocoPhillips Company | 1672 |
28 |
| Schlumberger Canada Limited | 7290 |
23 |
| Services Petroliers Schlumberger | 5782 |
23 |
| Schlumberger Technology B.v. | 5166 |
22 |
| Baker Hughes, a GE Company, LLC | 2112 |
22 |
| Baker Hughes Oilfield Operations, LLC | 2295 |
19 |
| Aramco Services Company | 3946 |
17 |
| Hydra Systems AS | 37 |
16 |
| M-I L.L.C. | 812 |
15 |
| Odfjell Well Services Norway AS | 19 |
15 |
| Weatherford Technology Holdings, LLC | 2021 |
14 |
| Petroleo Brasileiro S.A. - Petrobras | 843 |
14 |
| Altus Intervention (technologies) AS | 65 |
14 |
| Schlumberger Holdings Limited | 2833 |
13 |
| Prad Research and Development Limited | 2693 |
11 |
| Other owners | 455 |