- 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 43/267 - Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping
Patent holdings for IPC class E21B 43/267
Total number of patents in this class: 3158
10-year publication summary
|
256
|
411
|
354
|
393
|
243
|
206
|
263
|
203
|
132
|
43
|
| 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 |
620 |
| Schlumberger Technology Corporation | 9690 |
234 |
| Schlumberger Canada Limited | 6913 |
170 |
| Saudi Arabian Oil Company | 11322 |
146 |
| Schlumberger Technology B.v. | 4951 |
144 |
| Services Petroliers Schlumberger | 5426 |
142 |
| Schlumberger Holdings Limited | 2947 |
89 |
| Baker Hughes Holdings LLC | 3060 |
85 |
| CARBO Ceramics Inc. | 248 |
81 |
| Prad Research and Development Limited | 2696 |
69 |
| BJ Energy Solutions, LLC (formerly TES Asset Acquisition, LLC) | 196 |
49 |
| Baker Hughes Incorporated | 5689 |
33 |
| US Well Services LLC | 212 |
31 |
| ConocoPhillips Company | 1657 |
29 |
| ExxonMobil Upstream Research Company | 2525 |
29 |
| Baker Hughes, a GE Company, LLC | 2171 |
29 |
| Energy Recovery, Inc. | 168 |
26 |
| Aramco Services Company | 3504 |
24 |
| Chevron U.S.A. Inc. | 3774 |
20 |
| Hexion Inc. | 207 |
20 |
| Other owners | 1088 |