- 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 43/08 - Screens or liners
Patent holdings for IPC class E21B 43/08
Total number of patents in this class: 1766
10-year publication summary
172
|
149
|
155
|
160
|
148
|
118
|
108
|
117
|
61
|
19
|
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 |
449 |
Baker Hughes Incorporated | 5689 |
136 |
Schlumberger Technology Corporation | 9690 |
116 |
Schlumberger Canada Limited | 6913 |
72 |
Baker Hughes, a GE Company, LLC | 2171 |
72 |
Schlumberger Technology B.v. | 4951 |
60 |
Services Petroliers Schlumberger | 5426 |
60 |
Saudi Arabian Oil Company | 11322 |
53 |
ExxonMobil Upstream Research Company | 2525 |
51 |
Baker Hughes Oilfield Operations, LLC | 1885 |
50 |
Weatherford Technology Holdings, LLC | 2135 |
42 |
Schlumberger Holdings Limited | 2947 |
27 |
Prad Research and Development Limited | 2696 |
25 |
Baker Hughes Holdings LLC | 3060 |
22 |
3m Innovative Properties Company | 18406 |
18 |
Halliburton Manufacturing and Services Limited | 63 |
16 |
M-I L.L.C. | 893 |
16 |
Chevron U.S.A. Inc. | 3774 |
13 |
Aramco Services Company | 3504 |
12 |
CARBO Ceramics Inc. | 248 |
11 |
Other owners | 445 |