- 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 43/25 - Methods for stimulating production
Patent holdings for IPC class E21B 43/25
Total number of patents in this class: 1571
10-year publication summary
|
157
|
199
|
167
|
170
|
122
|
114
|
85
|
53
|
43
|
17
|
| 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 |
316 |
| Saudi Arabian Oil Company | 11322 |
104 |
| Schlumberger Technology Corporation | 9690 |
102 |
| Schlumberger Canada Limited | 6913 |
70 |
| Services Petroliers Schlumberger | 5426 |
53 |
| Schlumberger Technology B.v. | 4951 |
46 |
| Baker Hughes Holdings LLC | 3060 |
39 |
| Baker Hughes Incorporated | 5689 |
38 |
| ExxonMobil Upstream Research Company | 2525 |
28 |
| Baker Hughes, a GE Company, LLC | 2171 |
27 |
| Schlumberger Holdings Limited | 2947 |
21 |
| Aramco Services Company | 3504 |
21 |
| Prad Research and Development Limited | 2696 |
20 |
| ConocoPhillips Company | 1657 |
19 |
| Landmark Graphics Corporation | 1526 |
15 |
| Chevron U.S.A. Inc. | 3774 |
13 |
| Baker Hughes Oilfield Operations, LLC | 1885 |
13 |
| Maersk Olie og Gas AS | 103 |
12 |
| Weatherford Technology Holdings, LLC | 2135 |
11 |
| Flotek Chemistry, LLC | 120 |
11 |
| Other owners | 592 |