- 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 43/25 - Methods for stimulating production
Patent holdings for IPC class E21B 43/25
Total number of patents in this class: 1600
10-year publication summary
|
150
|
134
|
137
|
101
|
87
|
76
|
44
|
42
|
58
|
47
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21090 |
328 |
| Saudi Arabian Oil Company | 13686 |
114 |
| Schlumberger Technology Corporation | 11075 |
100 |
| Schlumberger Canada Limited | 7440 |
76 |
| Services Petroliers Schlumberger | 5885 |
58 |
| Schlumberger Technology B.v. | 5224 |
51 |
| Baker Hughes Holdings LLC | 3002 |
35 |
| Baker Hughes Incorporated | 5172 |
32 |
| ExxonMobil Upstream Research Company | 2378 |
28 |
| Baker Hughes, a GE Company, LLC | 2105 |
26 |
| Aramco Services Company | 4099 |
24 |
| Schlumberger Holdings Limited | 2784 |
21 |
| ConocoPhillips Company | 1689 |
21 |
| Prad Research and Development Limited | 2687 |
20 |
| Baker Hughes Oilfield Operations, LLC | 2393 |
17 |
| Chevron U.S.A. Inc. | 4020 |
16 |
| Landmark Graphics Corporation | 1515 |
15 |
| Marathon Petroleum Company LP | 380 |
12 |
| Weatherford Technology Holdings, LLC | 2034 |
11 |
| Flotek Chemistry, LLC | 116 |
11 |
| Other owners | 584 |