- 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 43/08 - Screens or liners
Patent holdings for IPC class E21B 43/08
Total number of patents in this class: 1813
10-year publication summary
|
149
|
155
|
160
|
148
|
118
|
108
|
118
|
70
|
55
|
26
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20862 |
455 |
| Schlumberger Technology Corporation | 10673 |
131 |
| Baker Hughes Incorporated | 5273 |
131 |
| Schlumberger Canada Limited | 7283 |
80 |
| Baker Hughes, a GE Company, LLC | 2113 |
72 |
| Schlumberger Technology B.v. | 5164 |
67 |
| Services Petroliers Schlumberger | 5775 |
67 |
| Baker Hughes Oilfield Operations, LLC | 2289 |
56 |
| Saudi Arabian Oil Company | 12997 |
55 |
| ExxonMobil Upstream Research Company | 2406 |
51 |
| Weatherford Technology Holdings, LLC | 2017 |
38 |
| Schlumberger Holdings Limited | 2834 |
27 |
| Prad Research and Development Limited | 2693 |
25 |
| Baker Hughes Holdings LLC | 3004 |
22 |
| 3m Innovative Properties Company | 17857 |
17 |
| Halliburton Manufacturing and Services Limited | 58 |
16 |
| M-I L.L.C. | 812 |
15 |
| Chevron U.S.A. Inc. | 3945 |
14 |
| Floway Innovations Inc. | 13 |
13 |
| Aramco Services Company | 3936 |
11 |
| Other owners | 450 |